AQUAZONE™
50RHC,RVC,RHR,RHS,
RVR,RVS,RDS006-060
Water Source Heat Pump Units
Installation, Start-Up, and
Service Instructions
Page
CONTENTS
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 36
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 36
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36,37
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Units with Aquazone Complete C Control . . . . . . . 36
Units with Aquazone Deluxe D Control . . . . . . . . . . 36
Units with HWR Option. . . . . . . . . . . . . . . . . . . . . . . . . . 37
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37,38
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Aquazone Deluxe D Control LED Indicators . . . . . 38
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-40
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Water Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 38
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Fan Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . 39
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Condenser Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Checking System Charge . . . . . . . . . . . . . . . . . . . . . 39
Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . 40
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 40
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
• PROTECTION
• INSPECT UNIT
Step 3 — Unit Location. . . . . . . . . . . . . . . . . . . . . . . . . . 14
• FIELD CONVERSION OF DISCHARGE AIR
Step 4 — Mounting the Unit . . . . . . . . . . . . . . . . . . . . . 15
• HORIZONTAL UNITS
• VERTICAL UNITS
Step 5 — Duct System . . . . . . . . . . . . . . . . . . . . . . . . . . 15
• SOUND ATTENUATION
• EXISTING DUCT SYSTEM
Step 6 — Condensate Drain . . . . . . . . . . . . . . . . . . . . . 16
• HORIZONTAL UNITS
• VERTICAL UNITS
• VENTING
Step 7 — Piping Connections . . . . . . . . . . . . . . . . . . . 16
• WATER LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
• GROUND-LOOP APPLICATIONS
Step 8 — Field Power Supply Wiring . . . . . . . . . . . . 18
• POWER CONNECTION
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 40-42
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
50RHC,RVC,RHR,RHS,RVR,RVS,RDS
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . CL-1, CL-2
• SUPPLY VOLTAGE
• 208-VOLT OPERATION
Step 9 — Field Control Wiring. . . . . . . . . . . . . . . . . . . 18
• THERMOSTAT CONNECTIONS
• WATER FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• ACCESSORY CONNECTIONS
IMPORTANT: Read the entire instruction manual before
starting installation.
• WATER SOLENOID VALVES
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-30
System Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PSC Blower Speed Selection . . . . . . . . . . . . . . . . . . 27
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . 30-32
C Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 30
C Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 30
D Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 30
D Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 30
Units with Modulating Hot Water Reheat
(HWR) Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
D Control Accessory Relay Configurations . . . . . 32
Water Valve (Slow Opening) . . . . . . . . . . . . . . . . . . . 32
Outside Air Damper (OAD) . . . . . . . . . . . . . . . . . . . . 32
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-36
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 33
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 33
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 34
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock or other
conditions which may cause personal injury or property dam-
age. Consult a qualified installer, service agency, or your distrib-
utor or branch for information or assistance. The qualified in-
staller or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instruc-
tions packaged with the kits or accessories when installing.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500007-01 Printed in U.S.A. Form 50R-5SI Pg 1 6-07 Replaces: 50R-4SI
Book 1
4
Tab 5a 5a
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STORAGE — If the equipment is not needed immediately at
the jobsite, it should be left in its shipping carton and stored in a
clean, dry area of the building or in a warehouse. Units must be
stored in an upright position at all times. If carton stacking is
necessary, stack units a maximum of 3 high. Do not remove
any equipment from its shipping package until it is needed for
installation.
INSPECT UNIT — To prepare the unit for installation, com-
plete the procedures listed below:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the
correct unit has been shipped.
2. Verify that the unit is the correct model for the entering
water temperature of the job.
PROTECTION — Once the units are properly positioned on
the jobsite, cover them with either a shipping carton, vinyl film,
or an equivalent protective covering. Cap open ends of pipes
stored on the jobsite. This precaution is especially important in
areas where painting, plastering, or spraying of fireproof mate-
rial, etc. is not yet complete. Foreign material that accumulates
within the units can prevent proper start-up and necessitate
costly clean-up operations.
3. Do not remove the packaging until the unit is ready for
installation.
4. Verify that the refrigerant tubing is free of kinks or dents,
and that it does not touch other unit components.
5. Inspect all electrical connections. Be sure connections are
clean and tight at the terminals.
6. Loosen compressor bolts until the compressor rides freely
on springs. Remove shipping restraints.
Before installing any of the system components, be sure to
examine each pipe, fitting, and valve, and remove any dirt or
foreign material found in or on these components.
1
7. Remove the four /4 in. shipping bolts from compressor
support plate (two bolts on each side) to maximize vibra-
tion and sound alternation.
DO NOT store or install units in corrosive environments or
in locations subject to temperature or humidity extremes
(e.g., attics, garages, rooftops, etc.). Corrosive conditions
and high temperature or humidity can significantly reduce
performance, reliability, and service life. Always move
units in an upright position. Tilting units on their sides may
cause equipment damage.
Failure to remove shipping brackets from spring-mounted
compressors will cause excessive noise and could cause
component failure due to added vibration.
8. Remove any blower support cardboard from inlet of the
blower.
9. Locate and verify any accessory kit located in compressor
section.
10. Remove any access panel screws that may be difficult to
remove once unit is installed.
3
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Table 1 — Physical Data — Aquazone™ 50RHC,RVC006-060 Units
UNIT 50RHC,RVC
COMPRESSOR (1 each)
006*
009
Rotary
012
018
024
030
Reciprocating
FACTORY REFRIGERANT CHARGE R-22
VERTICAL (oz)
FACTORY REFRIGERANT CHARGE R-22
HORIZONTAL (oz)
—
14
14
14
14
26
25
38
38
37
37
14
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds
PSC/3
PSC/3
PSC/3
PSC/3
1/8/1/6
PSC/3
1/4/3/4
PSC/3
3/4/3/4
1
1
1
Fan Motor Std/High Static (Hp)
Blower Wheel Size (D x W) (in.) Std/High Static
/
25/—
/
10/—
/10/—
5 x 5/—
5 x 5/—
6 x 5/—
8 x 7/8 x 7
9 x 7/9 x 7
9 x 7/10 x 8
1
1
1
1
3
3
WATER CONNECTION SIZE (FPT)
/
2
/
2
/
2
/
2
/
4
/
4
VERTICAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
—
—
—
—
—
—
10 x 15
1.04
10 x 15
1.04
20 x 17.25
2.4
20 x 17.25
2.4
20 x 17.25
2.4
3
/
3
/
3
/
3
/
3
/
8
8
8
8
8
Fin Spacing (FPI)
Number of Rows
Filter Standard — 1-in. Throwaway
Weight (lb)
Operating
Packaged
12
2
10 x 18
12
3
10 x 18
12
2
12
3
12
3
1 — 20 x 20
1 — 20 x 20
1 — 20 x 20
—
—
105
115
114
124
181
186
189
194
197
202
HORIZONTAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
10 x 15
1.04
10 x 15
1.04
10 x 15
1.04
16 x 22
2.44
16 x 22
2.44
16 x 22
2.44
3
/
3
/
3
/
3
/
3
/
3
/
8
8
8
8
8
8
Fin Spacing (FPI)
Number of Rows
Filter Standard — 1-in. Throwaway
Weight (lb)
Operating
Packaged
12
2
10 x 18
12
2
10 x 18
12
3
10 x 18
12
2
12
3
12
3
1 — 16 x 25
1 — 16 x 25
1 — 16 x 25
103
113
105
115
114
124
181
186
189
194
197
202
UNIT 50RHC,RVC
036
041†
042
048
060
COMPRESSOR (1 each)
Reciprocating
Scroll
FACTORY REFRIGERANT CHARGE R-22
VERTICAL (oz)
FACTORY REFRIGERANT CHARGE R-22
HORIZONTAL (oz)
42
41
50
50
51
51
66
66
74
74
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds
PSC/3
1/2/3/4
PSC/3
3/4/—
PSC/3
3/4/3/4
PSC/3
3/4/1
PSC/3
1/1
Fan Motor Std/High Static (Hp)
Blower Wheel Size (D x W) (in.) Std/High Static
9 x 8/10 x 8
9 x 8/—
9 x 8/10 x 8
10 x 10/12 x 10
11 x 10/11 x 10
3
3
3
WATER CONNECTION SIZE (FPT)
/
4
/
4
/
4
1
1
VERTICAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
24 x 21.25
3.62
1 — 20 x 17.25
2.4
24 x 21.25
3.62
24 x 28.25
4.71
20 x 28.25
4.71
3
/
3
/
3
/
3
/
3
/
8
8
8
8
8
Fin Spacing (FPI)
Number of Rows
14
2
11
4
12
3
12
3
12
3
1 — 14 x 24
1 — 18 x 24
1 — 14 x 24
1 — 18 x 24
Filter Standard — 1-in. Throwaway
1 — 24 x 24
1 — 20 x 20
1 — 24 x 24
Weight (lb)
Operating
Packaged
203
209
207
212
218
224
263
270
278
285
HORIZONTAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
20 x 25
3.47
—
—
—
—
—
20 x 25
3.47
20 x 35
4.86
20 x 35
4.86
3
/
3
/
3
/
3
/
8
8
8
8
Fin Spacing (FPI)
Number of Rows
14
2
12
3
12
3
12
3
1 — 20 x 28
2 — 20 x 14
1 — 20 x 28
2 — 20 x 14
1 — 20 x 24
1 — 20 x 14
1 — 20 x 24
1 — 20 x 14
Filter Standard — 1-in. Throwaway
—
Weight (lb)
Operating
Packaged
203
209
—
—
218
224
263
270
278
285
LEGEND
NOTES:
FPI
— Fins per Inch
PSC — Permanent Split Capacitor
1
1. All units have grommet compressor mountings, and
electrical knockouts.
/
2
and 3/4-in.
2. All sizes available as high-static units.
*Size 006 available in 50RHC unit only.
†Size 041 available in 50RVC unit only.
4
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Table 2 — Physical Data — Aquazone™ 50RHR,RVR006-060 Units
UNIT 50RHR,RVR
COMPRESSOR (1 each)
FACTORY CHARGE R-22 (oz)
006*
009
012
015
019
024
030
Reciprocating
41 44
036
042
048
060
Scroll
80
Rotary
12
15
15
30
30
30
46
54
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds
Fan Motor (Hp)
PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3
PSC/3
1
11 x 10
1
1
1
1
1
1
1
3
3
3
/
/
/
10
/
/
/
/
/
/
/
25
10
5 x 5
Blower Wheel Size (D x W) (in.)
5 x 5
6 x 5
9 x67
9 x57
9 x37
9 x27 10 x410 10 x410 10 x410
1
1
1
3
3
3
3
3
/
2
/
2
/
2
/
4
/
4
/
4
/
4
/
4
1
1
1
WATER CONNECTION SIZE (FPT)
VERTICAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
—
—
—
—
—
—
10 x 16
16 x 16
1.8
20 x 20
28 x 20
3.9
28 x 25
4.9
1.1
2.8
3
/
3
/
3
/
3
/
3
/
8
12
8
8
12
8
8
Fin Spacing (FPI)
Number of Rows
Filter Standard — 1-in. Throwaway
Weight (lb)
Operating
Packaged
12
3
16 x 20
12
3
28 x 24
10
4
28 x 30
3
3
10 x 20
20 x 24
—
—
112
122
121
131
147
157
169
179
193
203
219
231
229
241
257
269
267
279
323
338
HORIZONTAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
10 x 16
1.1
16 x 16
1.8
18 x 22
18 x 31
20 x 35
4.9
2.8
3.9
3
/
3
/
3
/
3
/
3
/
8
8
8
12
8
12
8
Fin Spacing (FPI)
Number of Rows
12
2
12
3
10
4
2
3
3
3
1 — 12 x 20
1 — 25 x 20
Filter Standard — 1-in. Throwaway
1 — 10 x 20
1 — 16 x 20
1 — 18 x 24
2 — 18 x 18
Weight (lb)
Operating
Packaged
110
120
112
122
121
131
147
157
169
179
193
203
219
231
229
241
257
269
267
279
323
338
LEGEND
NOTES:
1. All units have spring compressor mountings, TXV (thermostatic
FPI
— Fins per Inch
PSC — Permanent Split Capacitor
1
expansion valve) expansion devices, and
knockouts.
2. Size 048 available as high-static unit.
/
and 3/4-in. electrical
2
*Size 006 available in 50RHR unit only.
Table 3 — Physical Data — Aquazone 50RHS,RVS,RDS015-070 Units
UNIT 50RHS,RVS,RDS
COMPRESSOR (1 each)
FACTORY CHARGE R-22 (oz)
015
018
024
030
036
042
Scroll
74
048
060
102
070
Rotary
44
44
48
48
60
74
104
PSC FAN MOTOR AND BLOWER
Fan Motor Type/Speeds
Fan Motor (Hp)
PSC/3
9 x67
PSC/3
9 x67
PSC/3
9 x57
PSC/3
9 x37
PSC/3
9 x27
PSC/3
10 x210
PSC/3
10 x410
PSC/3
11 x410
PSC/3
1
11 x 10
1
1
1
1
1
1
3
3
/
/
/
/
/
/
/
/
Blower Wheel Size (D x W) (in.)
3
3
3
3
3
WATER CONNECTION SIZE (FPT) (in.)
HWG CONNECTION SIZE (FPT) (in.)
/
/
/
/
/
1
1
1
1
4
4
4
4
4
1
/
1
/
1
/
1
/
1
/
1
/
1
/
1
/
1
/
2
2
2
2
2
2
2
2
2
VERTICAL/DOWNFLOW
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
20 x 20
24 x 20
28 x 20
3.9
28 x 25
32 x 25
5.6
36 x 25
6.3
2.8
3.3
4.9
3
/
3
/
3
/
3
/
3
/
3
/
8
12
8
12
8
8
10
8
8
Fin Spacing (FPI)
Number of Rows
12
3
10
4
10
4
3
3
4
2 — 10 x
30
2 — 14 x
24
3 — 12 x
30
Filter Standard — 1-in. Throwaway
1 — 20 x 24
1 — 24 x 24
2 — 14 x 30
1 — 12 x
30
Weight (lb)
Operating
Packaged
174
184
184
194
250
260
252
262
266
276
323
333
327
337
416
426
443
453
HORIZONTAL
Air Coil
Dimensions (H x W) (in.)
Total Face Area (ft2)
Tube Size (in.)
18 x 22
2.8
18 x 27
3.4
18 x 31
3.9
20 x 35
4.9
20 x 40
5.6
20 x 45
6.3
3
/
3
/
3
/
3
/
3
/
3
/
8
8
8
8
8
8
Fin Spacing (FPI)
Number of Rows
12
3
12
3
12
3
10
4
10
4
10
4
1 — 18 x
20
2 — 18 x
18
2 — 12 x
20
1 — 20 x
25
2 — 24 x
20
Filter Standard — 1-in. Throwaway
1 — 18 x 24
2 — 18 x 18
1 — 24 x
20
Weight (lb)
Operating
Packaged
179
189
189
199
250
260
252
262
266
276
323
333
327
337
416
426
443
453
LEGEND
NOTES:
1. All units have spring compressor mountings, TXV (thermostatic
FPI
— Fins per Inch
1
expansion valve) expansion devices, and
knockouts.
2. Size 030 and 036 available as high-static units.
/
and 3/4-in. electrical
2
HWG — Hot Water Generator
PSC — Permanent Split Capacitor
5
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WATER CONNECTIONS
1 — In 2 — Out
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
RETURN CONNECTION
Using Air Coil Opening
OVERALL CABINET
H
J
K
Duct Flange Installed (±0.10 in.)
1
1
3
/
2 conduit
/
2 conduit
/
4 conduit
50RHC
UNITS
M
N
Q
R
A
B
C
Power
Supply
D
E
F
G
Therm
Ext Pump
L
Supply Supply
O
P
Return Return
S
T
Width Depth Height
Height
Depth
Depth
Height
in.
cm
19.1
48.5
34.1
86.6
11.0
27.9
9.6
24.4
0.8
2.0
1.8
4.4
0.8
2.0
8.1
20.6
5.1
13.0
2.1
5.4
0.8
1.9
8.9
22.7
6.7
17.0
5.2 1.3
13.3 3.3
16.1
41.0
9.8
25.0
1.1 0.6
2.7 1.5
006-012
in.
20.1
51.1
43.1
17.1
43.4
15.3
38.9
2.4
6.1
1.9
4.9
2.1
5.3
12.1
30.8
9.1
6.1
2.6
6.6
13.3
33.8
9.9
4.1 1.3
23.0
58.4
15.0
38.1
1.1 1.0
2.8 2.5
018-030
036-042
048
cm
109.5
23.2
15.6
25.1
10.5 3.3
in.
cm
20.1
51.1
47.1
119.6
21.1
53.6
18.8
47.6
2.2
5.5
4.7
11.9
1.2
3.0
16.1
41.0
13.1
33.3
10.1
25.7
2.5
6.3
16.1
40.9
11.0
27.9
3.0 2.5
7.7 6.4
25.9
65.8
19.0
48.3
1.1 1.0
2.8 2.5
in.
cm
24.1
61.2
54.1
137.4
21.1
53.6
19.4
49.2
5.9
14.9
4.3
11.0
2.3
5.8
16.1
41.0
13.1
33.3
10.1
25.7
3.7
9.5
16.1
41.0
13.7
34.8
4.1 1.3
10.3 3.2
35.9
91.2
19.0
48.3
1.1 1.0
2.8 2.5
in.
cm
24.1
61.2
54.1
137.4
21.1
53.6
19.4
49.2
5.9
14.9
4.3
11.0
2.3
5.8
16.1
41.0
13.1
33.3
10.1
25.7
1.7
4.4
18.1
46.0
13.7
34.8
4.1 1.3
10.3 3.2
35.9
91.2
19.0
48.3
1.1 1.0
2.8 2.5
060
NOTES:
1. Condensate is 3/4-in. FPT copper.
2. Horizontal unit shipped with filter bracket only. This bracket should be removed for return duct connection.
3. Hanger kit is factory installed.
LEGEND
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
AIRFLOW CONFIGURATION
Code
Return
Left
Discharge
S
E
Z
Right
Back
Left
a50-8155
Left
Right
Right
B
Back
Fig. 1 — 50RHC Dimensional Data
6
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WATER
CONNECTIONS
ELECTRICAL KNOCKOUTS (in.)
OVERALL
CABINET
DISCHARGE CONNECTION
RETURN CONNECTION
Using Return Air Opening
Duct Flange Installed ( 0.10 in.)
G
H
I
50RHR
UNITS
1
2
3
1
1
3
Loop
Water
FPT
/
2 conduit
/
2 conduit
/
4 conduit
F
L
M
P
Q
A
B
C
D
E
Ext
Pump
Power
Supply
Cond-
ensate
Therm
J
K
Supply Supply
Height Depth
N
O
Return Return
R
S
(in.)
Width Depth Height In Out
Depth
Height
in.
cm
22.4
56.8
43.1
109.5
11.3
28.7
2.4
5.4
0.6
1.5
3.5
8.9
5.5
14.0
8.2
20.8
5.8
4.0
5.8
14.7
8.0
20.3
5.8 1.5
14.7 3.8
17.1
43.4
9.3
23.6
2.2 1.0
5.6 2.5
1
/
006-012
2
6.1 13.7
14.7 10.2
in.
22.4
56.8
43.1
17.3
43.9
2.4 4.9
6.1 12.4
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
0.6
1.5
3.5
8.9
7.5
10.2
25.9
5.0
5.6
10.4
26.4
9.3
5.0 1.5
17.1
43.4
15.3
38.9
2.2 1.0
5.6 2.5
3
/
015-024
030
4
cm
109.5
19.1
12.7 14.2
23.6
12.7 3.8
in.
cm
22.4
56.8
53.2
135.1
19.3
49.0
0.6
1.5
5.7
14.5
9.7
24.6
12.2
31.0
5.0 6.8
12.7 17.3
10.4
26.4
9.3
23.6
5.0 2.1
12.7 5.3
23.1
58.7
17.3
43.9
2.2 1.0
5.6 2.5
3
/
4
in.
cm
22.4
56.8
53.2
135.1
19.3
49.0
0.6
1.5
5.7
14.5
9.7
24.6
12.2
31.0
2.9
7.4
3.8
9.7
13.5
34.3
13.1
33.3
2.9 1.9
7.4 4.8
23.1
58.7
17.3
43.9
2.2 1.0
5.6 2.5
3
/
036
4
in.
cm
22.4
56.8
62.2
158.0
19.3
49.0
0.6
1.5
5.7
14.5
9.7
24.6
12.2
31.0
2.9
7.4
3.8
9.7
13.5
34.3
13.1
33.3
2.9 1.9
7.4 4.8
32.1
81.5
17.3
43.9
2.2 1.0
5.6 2.5
042-048
060
1
1
in.
cm
25.4
64.5
71.2
180.8
21.3
54.1
0.6
1.5
8.1
20.6
11.7
29.7
14.2
36.1
5.8
14.7 12.7
5.0
13.6
34.5
13.3
33.8
5.8 2.9
14.7 7.4
36.1
91.7
19.3
49.0
2.2 1.0
5.6 2.5
NOTES:
1. Condensate is 3/4-in. FPT copper.
2. Horizontal unit shipped with filter bracket only. This bracket should be removed for return duct connection.
3. Hanger kit is factory installed. Isolation grommets are provided.
4. Right and left orientation is determined by looking at water connection side.
LEGEND
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
LEFT RETURN
RIGHT RETURN
Water
Water
Connection
ASP
Connection
2‘
Service
Front
CSP
Access
3
‘
Service
Front
Access
Power Supply
3/4“ Knockout
Left Return
Right Return
3.25
1/2“
Knockout
CSP
ASP
1.6 [40.6mm]
3.25
Low Voltage
1/2“ Knockout
I
CAP
H
F
F
Right
Discharge
G
2
1
3
Left
Discharge
3
E
D
Condensate
3/4 FPT
Back
Discharge
A
Back
Discharge
Condensate
“
3/4 FTP
“
Front-View
M
O
Unit Hanger Detail
M
N
BSP
Blower
Outlet
Model
X
Y
Z
BSP
L
C
C
006-024 43.1 24.375 20.375
030-036 53.1 24.375 20.375
042-048 62.1 24.375 20.375
Blower
Outlet
Y
Z
L
N
060
71.1 27.375 23.375
O
A
A
X
B Configuration - Right Return Back Discharge
E Configuration - Left Return Back Discharge
J
M
K
M
Left
View
Blower
Outlet
BSP
ASP
BSP
L
CSP
Right
View
Blower
Outlet
L
K
3‘
Front
Front
SERVICE
ACCESS
M
Z Configuration - Right Return Left Discharge -
S Configuration - Left Return Right Discharge -
Air Coil Opening
Air Coil Opening
Air Coil
1.1
S
S
R
P
P
Air Coil
R
CSP
Left
View
ASP
Q
Q
C
C
Right
View
Front
Front
B
B
S Configuration - Left Return Right Discharge -
Z Configuration - Right Return Left Discharge -
Air Coil Opening
Air Coil Opening
AIRFLOW CONFIGURATION
a50-8156
Code
Return
Left
Discharge
S
E
Z
Right
Back
Left
Left
Right
Right
B
Back
Fig. 2 — 50RHR Dimensional Data
7
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WATER CONNECTIONS
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
RETURN CONNECTION
Using Air Coil Opening
OVERALL CABINET
G
H
I
Duct Flange Installed (±0.10 in.)
1
2
3
1
1
3
Loop
Water
FPT
/
2 conduit
/
2 conduit
/
4 conduit
50RHS
UNITS
HWG
FPT
(in.)
F
L
M
P
Q
A
B
C
D
E
Out
Power
Supply
Cond-
ensate
Therm
Ext Pump
J
K
Supply Supply
Height Depth
N
O
Return Return
Depth Height
R
S
(in.)
Width Depth Height In
in.
22.4
53.2
19.3
49.0
2.4
5.4
0.6
1.5
5.7
9.7
12.2
31.0
5.0
6.8
10.4
26.4
9.3
5.0 2.1
23.1
58.7
17.3
43.9
2.2 1.0
5.6 2.5
3
/
1
/
015-018
024-030
036
4
2
cm
56.8 135.1
6.1 13.7
14.5
24.6
12.7 17.3
23.6
12.7 5.3
in.
cm
22.4 62.2
56.8 158.0
22.4 62.2
56.8 158.0
25.4 71.2
64.5 180.8
25.4 76.2
64.5 193.5
25.4 81.2
64.5 206.2
19.3
49.0
2.4
6.1 13.7
5.4
0.6
1.5
5.7
14.5
9.7
24.6
12.2
31.0
5.0
12.7 17.3
6.8
10.4
26.4
9.3
23.6
5.0 2.1
12.7 5.3
28.1
71.4
17.3
43.9
2.2 1.0
5.6 2.5
3
/
1
/
4
2
in.
cm
19.3
49.0
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
0.6
1.5
5.7
14.5
9.7
24.6
12.2
31.0
5.0 6.8
12.7 17.3
5.8 5.0
14.7 12.7
5.8 5.0
14.7 12.7
10.4
26.4
9.3
23.6
5.0 2.1
12.7 5.3
32.1
81.5
17.3
43.9
2.2 1.0
5.6 2.5
3
/
1
/
4
2
in.
cm
21.3
54.1
0.6
1.5
8.1
20.6
11.7
29.7
14.2
36.1
13.6
34.5
13.3
33.8
5.8 2.9
14.7 7.4
36.1
91.7
19.3
49.0
2.2 1.0
5.6 2.5
1
/
042-048
060
1
1
1
2
in.
cm
21.3
54.1
0.6
1.5
8.1
20.6
11.7
29.7
14.2
36.1
13.6
34.5
13.3
33.8
5.8 2.9
14.7 7.4 104.4
41.1
19.3
49.0
2.2 1.0
5.6 2.5
1
/
2
in.
cm
21.3
54.1
0.6
1.5
8.1
20.6
11.7
29.7
14.2
36.1
5.8
14.7 12.7
5.0
13.6
34.5
13.3
33.8
5.8 2.9
14.7 7.4 117.1
46.1
19.3
49.0
2.2 1.0
5.6 2.5
1
/
070
2
NOTES:
1. Condensate is 3/4-in. FPT copper.
2. Horizontal unit shipped with filter bracket only. This bracket should be removed for return duct connection.
3. Hanger kit is factory installed. Isolation grommets are provided.
4. Right and left orientation is determined by looking at water connection side.
LEGEND
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
AIRFLOW CONFIGURATION
Code
Return
Left
Discharge
S
E
Z
Right
Back
Left
a50-8157
Left
Right
Right
B
Back
Fig. 3 — 50RHS Dimensional Data
8
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UNIT HANGER ISOLATION DETAIL
Fig. 4 — Typical Installation — 50RHC,RHR,RHS Units
9
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WATER CONNECTIONS
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
RETURN CONNECTION
Using Air Coil Opening
OVERALL CABINET
J
K
L
Duct Flange Installed (±0.10 in.)
1
2
3
1
1
3
/
2 conduit
/
2 conduit
/
4 conduit
50RVC
UNITS
Water
FPT
Size
D
E
F
G
H
I
O
P
S
T
A
B
C
Ext.
Pump
Power
Supply
Therm
M
N
Supply Supply
Width Depth
Q
R
Return Return
Depth Height
U
Width Depth Height
In
Out
Condensate
in.
19.1
19.1
48.5
22.0 1.4 2.8 9.4 2.8
6.1
2.3
5.9
1/2
1.3
2.9
7.3
5.9
14.9
8.9
22.5
8.9 5.1
9.0
9.0
5.5 2.1 16.2
9.9 0.7
25.1 1.9
009-012
cm 48.5
55.9 3.6 7.1 24.0 7.1 15.6
22.7 12.9 22.9
22.9 14.0 5.3 41.1
3
in. 21.5
cm 54.6
in. 21.5
cm 54.6
in. 21.5
cm 54.6
in. 24.0
cm 6.10
21.5
54.6
39.0 1.8 3.8 15.2 3.6
8.1
2.3
5.8
/
4.1
7.1
10.1
25.7
6.4 3.8 14.0
16.1 9.5 35.6
14.0 5.3 2.3 18.3
35.6 13.6 5.8 46.5
14.0 5.1 2.3 22.8
35.6 13.1 5.8 57.9
14.0 5.3 2.3 18.3
35.6 13.6 5.8 46.5
18.0 5.1 2.3 29.3
45.7 13.1 5.8 74.4
20.2 0.7
51.3 1.9
4
018-030
036 & 042
041
99.1 4.5 9.7 38.6 9.1 20.6
1.9
3
10.5
18.1
26.0
66.0
44.0 2.0 3.7 16.2 2.6 10.4
111.8 5.1 9.4 41.1 6.6 28.4
2.3
5.8
/
4.1
10.5
7.1
18.1
10.1
25.7
6.4 3.8 14.0
16.1 9.5 35.6
24.2 0.7
61.4 1.9
4
1.9
3
21.5
54.6
39.0 1.7 3.6 16.4 2.6
99.1 4.4 9.1 41.7 6.6 20.6
8.1
2.3
5.8
/
4.1
10.5
7.1
18.1
10.1
25.7
6.4 3.8 14.0
16.1 9.5 35.6
20.2 0.7
51.3 1.9
4
1.9
32.5
82.6
46.0 1.8 5.9 16.7 2.3 10.1
116.8 4.5 14.9 42.4 5.8 25.7
2.3
5.8
1
2.5
4.1
10.5
7.1
18.1
10.1
25.7
6.9 7.3 16.0
17.4 18.4 40.6
24.2 0.7
61.4 1.9
048-060
NOTES:
1. Condensate is 3/4-in. (19.1 mm) FPT.
2. Filter bracket extending from unit 2.5-in. (6.4 cm). This bracket should be removed when connecting return duct.
3. Discharge flange field installed.
LEGEND
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
AIRFLOW CONFIGURATION
Code
L
R
Return
Left
Discharge
Top
Top
a50-8158
Right
Fig. 5 — 50RVC Dimensional Data
10
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WATER CONNECTIONS
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
RETURN CONNECTION
Using Air Coil Opening
OVERALL CABINET
G
H
I
Duct Flange Installed (±0.10 in.)
1
2
3
1
1
3
Loop
Water
FPT
/
2 conduit
/
2 conduit
/
4 conduit
50RVR
UNITS
F
L
M
P
Q
A
Width
B
C
D
E
Power
Supply
Cond-
ensate
Therm
Ext Pump
J
K
Supply Supply
Height Depth
N
O
Return Return
Depth Height
R
(in.)
Depth Height
In
Out
in.
cm
22.4
56.8
21.6
54.9
22.6
57.4
2.6
5.4
7.8
19.8
3.5
8.9
5.5
14.0
8.2
20.8
10.6
6.8
5.8
14.7
8.0
20.3
6.0 2.2
15.2 5.6
17.1
43.4
9.3
23.6
1.0
2.5
1
/
009-012
2
6.6 13.7
26.9 17.3
in.
22.4
56.8
21.6
54.9
34.6
87.9
2.4
4.8
8.5
3.5
8.9
7.5
10.2
25.9
7.2
3.8
9.7
14.0
35.6
14.0
35.6
4.3 2.2
17.1
43.4
15.3
38.9
1.0
2.5
3
/
015-024
030
4
cm
6.1 12.2
21.6
19.1
18.3
10.9 5.6
in.
cm
22.4
56.8
25.6
65.1
40.6
103.1
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
9.7
24.6
5.7
14.5
9.7
24.6
12.2
31.0
7.2
18.3 14.7
5.8
14.0
35.6
14.0
35.6
4.3 2.2
10.9 5.6
21.1
53.6
19.2
48.8
1.0
2.5
3
/
4
in.
cm
22.4
56.8
25.6
65.1
40.6
103.1
9.7
24.6
5.7
14.5
9.7
24.6
12.2
31.0
7.2
18.3 14.7
5.8
14.0
35.6
14.0
35.6
4.3 2.2
10.9 5.6
21.1
53.6
19.2
48.8
1.0
2.5
3
/
036
4
in.
cm
22.4
56.8
25.6
65.1
48.6
123.4
9.7
24.6
5.7
14.5
9.7
24.6
12.2
31.0
7.2 5.8
18.3 14.7
6.2 6.3
15.7 16.0
14.0
35.6
14.0
35.6
4.3 2.2
10.9 5.6
21.1
53.6
27.2
69.1
1.0
2.5
042-048
060
1
1
in.
cm
25.4
64.5
30.6
77.8
50.6
128.5
10.7
27.2
8.1
20.6
11.7
29.7
14.2
36.1
18.0
45.7
18.0
45.7
5.1 2.2
13.0 5.6
26.1
66.3
27.2
69.1
1.0
2.5
NOTES:
1. Condensate is 3/4-in. FPT and is switchable from side to front.
2. Vertical unit shipped with filter bracket only extending from unit 2.5 inches. This bracket should be removed when connecting return duct.
3. Discharge flange field installed.
4. Right and left orientation is determined by looking at water connection side.
Field Installed
Water Connection
Access Panels
Discharge Flange
(Shipped loose in
blower section)
LEGEND
Standard Filter Bracket
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
LEFT RETURN
RIGHT RETURN
M
Air Coil
ASP
B
BSP
K
M
K
3’ Service
Access
L
J
L
Left Return
A
ASP
(right
Opposite)
CSP
CAP
N
Air Coil Side
Air Coil Side
Front
R Configuration - Top View-Right Return
L Configuration - Top View-Left Return
Water
Connections
3’ Service
Access
Isometric
View
O
P
P
O
1.000
R
R
Air Coil
Air Coil
Q
Q
C
C
Condensate
3/4 FPT
“
Power Supply
3/4“ HV Knockout
CAP
Power for
Condensate Pump
1/2 Knockout
“
ASP
Low Voltage
1/2“ LV Knockout
3
CSP
I
H
2
1
F
Front
Back
Front
CSP
Back
G
E
D
R Configuration - Right Return Right View
- Air Coil Opening
L Configuration - Left Return Left View
- Air Coil Opening
Front View
a50-8159
AIRFLOW CONFIGURATION
Code
L
R
Return
Left
Discharge
Top
Top
Right
Fig. 6 — 50RVR Dimensional Data
11
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WATER CONNECTIONS
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
RETURN CONNECTION
Using Air Coil Opening
OVERALL CABINET
G
H
I
Duct Flange Installed (±0.10 in.)
1
2
3
1
1
3
Loop
Water
FPT
/
2 conduit
/
2 conduit
/
4 conduit
50RVS
UNITS
HWG
FPT
(in.)
F
L
M
P
Q
A
B
C
D
In
E
Power
Supply
Cond-
ensate
Therm
Ext Pump
J
K
Supply Supply
Height Depth
N
O
Return Return
Depth Height
R
(in.)
Width Depth Height
Out
in.
cm
22.4
56.8
25.6
65.1
40.6
103.1
2.4
5.4
9.7
24.6
5.7
14.5
9.7
24.6
12.2
31.0
7.2 5.8
18.3 14.7
14.0
35.6
14.0
35.6
4.3 2.2
10.9 5.6
21.1
53.6
19.2
48.8
1.0
2.5
3
/
1
/
015-018
4
2
6.1 13.7
in.
22.4
56.8
25.6
65.1
44.6
2.4
5.4
9.7
5.7
9.7
12.2
31.0
7.2 5.8
14.0
35.6
14.0
35.6
4.3 2.2
21.1
53.6
23.2
58.9
1.0
2.5
3
/
1
/
024-030
036
4
2
cm
113.3
6.1 13.7
24.6
14.5
24.6
18.3 14.7
10.9 5.6
in.
cm
22.4
56.8
25.6
65.1
48.6
123.4
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
2.4 5.4
6.1 13.7
9.7
24.6
5.7
14.5
9.7
24.6
12.2
31.0
7.2 5.8
18.3 14.7
14.0
35.6
14.0
35.6
4.3 2.2
10.9 5.6
21.1
53.6
27.2
69.1
1.0
2.5
3
/
1
/
4
2
in.
cm
25.4
64.5
30.6
77.8
50.6
128.5
10.7
27.2
8.1
20.6
11.7
29.7
14.2
36.1
6.2 6.3
15.7 16.0
18.0
45.7
18.0
45.7
5.1 2.2
13.0 5.6
26.1
66.3
27.2
69.1
1.0
2.5
1
/
042-048
060
1
1
1
2
in.
cm
25.4
64.5
30.6
77.8
54.6
138.7
10.7
27.2
8.1
20.6
11.7
29.7
14.2
36.1
6.2 6.3
15.7 16.0
18.0
45.7
18.0
45.7
5.1 2.2
13.0 5.6
26.1
66.3
31.2
79.2
1.0
2.5
1
/
2
in.
cm
25.4
64.5
30.6
77.8
58.6
148.8
10.7
27.2
8.1
20.6
11.7
29.7
14.2
36.1
6.2 6.3
15.7 16.0
18.0
45.7
18.0
45.7
5.1 2.2
13.0 5.6
26.1
66.3
35.2
89.4
1.0
2.5
1
/
070
2
NOTES:
1. Condensate is 3/4-in. FPT and is switchable from side to front.
2. Vertical unit shipped with filter bracket only extending from unit 2.5 inches. This bracket should be removed when connecting return duct.
3. Discharge flange field installed.
4. Right and left orientation is determined by looking at water connection side.
Field Installed
Water Connection
Access Panels
LEGEND
Discharge Flange
(Shipped loose in
blower section)
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
Standard Filter Bracket
LEFT RETURN
RIGHT RETURN
M
Air Coil
ASP
B
BSP
K
M
K
3’ Service
Access
L
J
L
Left Return
A
ASP
(right
Opposite)
CSP
CAP
N
Air Coil Side
Air Coil Side
Front
R Configuration - Top View-Right Return
L Configuration - Top View-Left Return
Water
Connections
3’ Service
Access
Isometric
View
O
P
P
O
1.000
R
R
Air Coil
Air Coil
Q
Q
C
C
Condensate
3/4 FPT
“
Power Supply
3/4“ HV Knockout
CAP
Power for
Condensate Pump
1/2 Knockout
“
ASP
Low Voltage
1/2“ LV Knockout
3
CSP
I
H
2
1
F
Front
Back
Front
CSP
Back
G
E
D
R Configuration - Right Return Right View
- Air Coil Opening
L Configuration - Left Return Left View
- Air Coil Opening
Front View
AIRFLOW CONFIGURATION
Code
L
R
Return
Left
Discharge
a50-8169
Top
Top
Right
Fig. 7 — 50RVS Dimensional Data
12
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WATER CONNECTIONS (in.)
ELECTRICAL KNOCKOUTS (in.)
DISCHARGE CONNECTION
Outlet Opening Only
RETURN CONNECTION
OVERALL CABINET
J
K
L
Using Return Air Opening
1
2
3
F
4
5
1
1
3
Loop
Water
FPT
/
2 conduit
/
2 conduit
/
4 conduit
50RDS
UNITS
HWG
FPT
(in.)
G
H
O
P
S
T
A
B
C
D
In
E
Out
Ext
Pump
Power
Supply
HWG HWG Cond-
Therm
M
N
Supply Supply
Q
R
Return Return
Depth Height
U
(in.)
Width Depth Height
In
Out ensate
Width
Depth
in.
cm
in.
cm
in.
cm
in.
cm
in.
cm
in.
22.4
56.8
25.6
65.1
44.6 16.9 13.9
5.4
2.4
6.1
3.5
8.9
13.6
34.5
9.7
7.2
6.1
8.2
10.4
26.4
9.3
11.0 2.2
27.9 5.6
21.1
53.6
20.2
51.3
20.4
51.8
015-018
3/4
3/4
3/4
1
1/2
1/2
1/2
1/2
1/2
1/2
113.3 42.9 35.3 13.7
24.6
18.3
15.4 20.8
23.5
22.4
56.8
25.6
65.1
48.6 16.9 13.9
123.4 42.9 35.3 13.7
5.4
2.4
6.1
3.5
8.9
13.6
34.5
9.7
24.6
7.2
18.3
6.1
15.4 20.8
8.2
10.4
26.4
9.3
23.5
11.0 2.2
27.9 5.6
21.1
53.6
24.2
61.5
20.4
51.8
024-030
036
22.4
56.8
25.6
65.1
52.6 16.9 13.9
133.6 42.9 35.3 13.7
5.4
2.4
6.1
3.5
8.9
13.6
34.5
9.7
24.6
7.2
18.3
6.1
15.4 20.8
8.2
10.4
26.4
9.3
23.5
11.0 2.2
27.9 5.6
21.1
53.6
28.2
71.6
20.4
51.8
25.4
64.5
30.6
77.8
54.6 18.9 15.9 5.4
2.4
6.1
3.5
8.9
13.1
33.3
9.7
24.6
7.2
18.3
7.2 8.7
13.6
34.4
13.3
33.7
10.5 2.2
26.7 5.6
26.1
66.3
28.2
71.6
22.4
56.9
042-048
060
138.7 48.0 40.4 13.7
58.6 18.9 15.9 5.4
18.3 22.1
7.2 8.7
25.4
64.5
30.6
77.8
2.4
6.1
3.5
8.9
13.1
33.3
9.7
24.6
7.2
18.3
13.6
34.4
13.3
33.7
10.5 2.2
26.7 5.6
26.1
66.3
32.2
81.8
22.4
56.9
1
148.8 48.0 40.4 13.7
18.3 22.1
25.4
64.5
30.6
77.8
62.6 18.9 15.9 5.4
159.0 48.0 40.4 13.7
2.4
6.1
3.5
8.9
13.1
33.3
9.7
24.6
7.2
18.3
7.2
18.3 22.1
8.7
13.6
34.4
13.3
33.7
10.5 2.2
26.7 5.6
26.1
66.3
36.2
91.9
22.4
56.9
070
1
cm
LEGEND
HWG — Hot Water Generator
NOTES:
1. Condensate is 3/4-in. PVC FPT and is switchable from side to front.
2. Vertical unit shipped with filter bracket only extending from unit 2.5 inch. This bracket should be removed when connecting return duct.
LEGEND
Standard Filter Bracket
ASP
BSP
CAP
CSP
—
—
—
—
Alternate Service Panel
Blower Service Panel
Control Access Panel
Compressor Service Panel
CSP
ASP
a50-
6743ef.
eps
ASP
CAP
P
N
N
P
3’ Service
BSP
Blower
Opening
Access Left Rtn
(right opposite)
O
Q
Blower
Opening
O
M
A
A
Front
Front
Condensate 3/4”
FPT
Air Coil Side
Air Coil Side
3’ Service
Access
B
B
Left Return/Bottom Discharge
Floor Foot Print
Isometric View
Right Return/Bottom Discharge
Floor Foot Print
(Top View)
(Top View)
Power Supply
3/4 HV Knockout
”
1.6
1.6
G
1.1
1/2” Knockout
L
4
F
K
Low Voltage
J
3
1/2 LV Knockout
”
E
ASP
CSP
U
U
D
CAP
2
1
CSP
Air Coil
Air Coil
BSP
Condensate
Condensate
3/4 FPT Right Return
T
T
C
3/4”
FPT Left Return
”
5
5
Front
Back
Front
Back
H
R
R
S
S
Right Return-
Air Coil Opening
(Right Side View)
Left Return -
Air Coil Opening
(Left Side View)
Front-View
Fig. 8 — 50RDS Dimensional Data
13
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Supply Air
conversion process is the same for right and left return configu-
rations. See Fig. 11 and 12.
NOTE: It is not possible to convert return air between left or
right return models in the field due to refrigerant piping
changes.
Building
Loop
Flexible
Connection
Water
Out
Preparation — The unit should be on the ground in a well lit
area for conversion. Hung units should be taken down to
ground level before converting.
Side to Back Discharge Conversion
1. Remove screws to free the top and discharge panels. See
Fig. 11.
2. Remove the access panel and set aside.
3. Lift the discharge panel from side of unit and rotate it to
back using care not to damage blower wiring.
4. Check blower wire routing and connections for undo
tension or contact with sheet metal edges. Re-route if
necessary.
Water
In
Balancing Valve
(field installed
and calibrated
accessory)
Field-supplied
stainless steel
braid hose
with integral
“J” swivel
Low Pressure
Drop Water
Control Valve
(optional)
(field-installed
accessory)
Power
Thermostat
Wiring
Ball Valve with optional
integral P/T plug
(typical for supply and
return piping)
Compressor
Access Panel
NOTE: Ball valve with integral pressure temperature plug recommended.
5. Check refrigerant tubing for contact with other compo-
nents. Adjust if necessary.
6. Reinstall top panel using screws set aside in Step 1.
Fig. 9 — Typical Vertical Installation —
50RVC,RVR,RVS Units
NOTE: Location for some screws at bottom of discharge panel
may have to be changed.
Building
Loop
Flexible
Connection
7. Manually spin fan wheel to check for obstructions.
Adjust for any obstruction found.
8. Replace access panel.
Back to Side Discharge Conversion — Follow instructions
above for Side to Back Discharge Conversion, noting the
panels would be reversed.
Water
Out
Water
In
Balancing Valve
(field-installed
and calibrated
accessory)
Field-supplied
stainless steel
braid hose
with integral
“J” swivel
Low Pressure
Drop Water
Control Valve (optional)
(field-installed
accessory)
Power
Remove Screws
Water
Thermostat
Wiring
Connection End
Ball Valve with optional
integral P/T plug
(typical for supply and
return piping)
Compressor
Access Panel
Return Air
Flexible
Connection
Supply Air
NOTE: Ball valve with integral pressure temperature plug recommended.
Fig. 10 — Typical Downflow Installation —
50RDS Units
Side Discharge
Water
Step 3 — Unit Location — The following guidelines
Connection End
should be considered when choosing a location for a WSHP:
Rotate
• Units are for indoor use only.
Return Air
• Locate in areas where ambient temperatures are between
40 F and 100 F and relative humidity is no greater than
75%.
• Provide sufficient space for water, electrical and duct
connections.
• Locate unit in an area that allows easy access and
removal of filter and access panels.
• Allow enough space for service personnel to perform
maintenance.
• Return air must be able to freely enter the space if unit
needs to be installed in a confined area such as a closet.
Move to Side
Replace Screws
Water
Connection End
NOTE: Correct placement of the horizontal unit can play an
important part in minimizing sound problems. Since duct-
work is normally applied to these units, the unit can be
placed so that the principal sound emission is outside the oc-
cupied space in sound-critical applications. A fire damper
may be required by the local code if a fire wall is penetrated.
Return Air
Drain
FIELD CONVERSION OF DISCHARGE AIR — The dis-
charge air of the 50RHC,RHR,RHS horizontal units can be
converted between side and back discharge in the field. The
Discharge Air
Back Discharge
Fig. 11 — Conversion Left Return,
Side Discharge to Back Discharge
14
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Water
Connection End
vibration absorption pad slightly larger than the entire base to
minimize vibration transmission. It is not necessary to mount
the unit on the floor. See Fig. 14.
Return Air
NOTE: Some codes require the use of a secondary drain pan
under vertical units. Check local codes for more information.
Supply
Duct
Step 5 — Duct System — Size the duct system to han-
dle the design airflow quietly.
Side Discharge
Water
Connection End
NOTE: Depending on the unit, the fan wheel may have a ship-
ping support installed at the factory. This must be removed
before operating unit.
Return Air
Drain
SOUND ATTENUATION — To eliminate the transfer of
vibration to the duct system, a flexible connector is recom-
mended for both discharge and return air duct connections on
metal duct systems. The supply and return plenums should in-
clude internal duct liner of fiberglass or be made of duct board
construction to maximize sound attenuation of the blower.
Installing the WSHP unit to uninsulated ductwork in an uncon-
ditioned space is not recommended since it will sweat and
adversely affect the unit’s performance.
Back Discharge
Discharge Air
Fig. 12 — Conversion Right Return,
Side Discharge to Back Discharge
To reduce air noise, at least one 90-degree elbow could be
included in the supply and return air ducts, provided system
performance is not adversely impacted. The blower speed can
also be changed in the field to reduce air noise or excessive air-
flow, provided system performance is not adversely impacted.
Step 4 — Mounting the Unit
HORIZONTAL UNITS (50RHC,RHR,RHS) — Horizontal units
should be mounted using the factory-installed hangers. Proper
attachment of hanging rods to building structure is critical for
safety. See Fig. 4 and 13. Rod attachments must be able to sup-
port the weight of the unit. See Tables 1-3 for unit operating
weights.
VERTICAL UNITS (50RVC,RVR,RVS,RDS) — Vertical and
downflow units are available in left or right return air configu-
rations. See Fig. 6-8. Mount the unit (except 50RDS) on a
EXISTING DUCT SYSTEM — If the unit is connected to
existing ductwork, consider the following:
• Verify that the existing ducts have the proper capacity to
handle the unit airflow. If the ductwork is too small,
install larger ductwork.
• Check existing ductwork for leaks and repair as
necessary.
NOTE: Local codes may require ventilation air to enter the
space for proper indoor air quality. Hard-duct ventilation may
be required for the ventilating air supply. If hard ducted venti-
lation is not required, be sure that a proper air path is provided
for ventilation air to unit to meet ventilation requirement of the
space.
D
Compressor
Section
Air Handler
Section
A
E
C
B
DIMENSIONS (in.)
50RHC UNITS
A
16.9
18
18
22
B
C
006-012
018-030
036,042
048,060
34.1
43.1
47.1
54.1
21.1
22.2
22.2
26.2
DIMENSIONS (in.)
C
50RHR UNITS
A
B
D
E
006-024
030,036
042,048
060
22.375
22.375
22.375
25.375
43.1
52.1
61.1
71.1
24.375
24.375
24.375
27.375
43.1
52.1
61.1
71.1
20.375
20.375
20.375
23.375
Vibration
Absorption
Pad
DIMENSIONS (in.)
C
50RHS UNITS
A
B
D
E
015,018
024-036
042,048
060
22.375
22.375
25.375
25.375
25.375
51
61
70
75
80
24.375
24.375
27.375
27.375
27.375
53
63
72
77
82
20.375
20.375
20.375
23.375
23.375
070
Fig. 14 — 50RVC,RVR,RVS Units Mounted With
Vibration Absorption Pad
Fig. 13 — Horizontal Hanger Bracket
(Factory Installed)
15
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VENTING — Install a vent in the condensate line of any
application that may allow dirt or air to collect in the line. Con-
sider the following:
Step 6 — Condensate Drain
HORIZONTAL UNITS (50RHC,RHR,RHS) — Slope the
unit toward the drain at a 1/4 in. drop at drain end. See Fig. 15.
If it is not possible to meet the required pitch, install a conden-
sate pump at the unit to pump condensate to building drain.
Horizontal units are not internally trapped, therefore an ex-
ternal trap is necessary. Install each unit with its own individual
trap and means to flush or blowout the condensate drain line.
Do not install units with a common trap or vent. For typical
condensate connections see Fig. 16.
• Always install a vent where an application requires a
long horizontal run.
• Always install a vent where large units are working
against higher external static pressure and to allow
proper drainage for multiple units connected to the same
condensate main.
• Be sure to support the line where anticipated sagging from
the condensate or when “double trapping” may occur.
• If condensate pump is present on unit, be sure drain con-
nections have a check valve to prevent back flow of con-
densate into other units.
NOTE: Never use a pipe size smaller than the connection.
VERTICAL UNITS (50RVC,RVR,RVS) — Each unit uses a
condensate hose inside all cabinets as a trapping loop, therefore
an external trap is not necessary. See Fig. 17.
Each unit must be installed with its own individual vent and
means to flush or blowout the condensate drain line. Do not in-
stall units with a common trap or vent.
Step 7 — Piping Connections — Depending on the
application, there are 3 types of WSHP piping systems to
choose from: water loop, ground-water and ground loop. Refer
to Piping Section of Carrier System Design Manual for addi-
tional information.
All WSHP units use low temperature soldered female pipe
thread fittings for water connections to prevent annealing and
out-of-round leak problems which are typically associated with
high temperature brazed connections. Refer to Tables 1-3 for
connection sizes. When making piping connections, consider
the following:
1/4” Pitch for
Drainage
• Use a backup wrench when making screw connections to
unit to prevent internal damage to piping.
• Insulation may be required on piping to avoid condensa-
tion in the case where fluid in loop piping operates at
temperatures below dew point of adjacent air.
• Piping systems that contain steel pipes or fittings may
be subject to galvanic corrosion. Dielectric fittings may
be used to isolate the steel parts of the system to avoid
galvanic corrosion.
Pitch Toward
Drain
Drain Connection
Fig. 15 — Horizontal Unit Pitch
WATER LOOP APPLICATIONS — Water loop applications
usually include a number of units plumbed to a common pip-
ing system. Maintenance to any of these units can introduce air
into the piping system. Therefore, air elimination equipment
comprises a major portion of the mechanical room plumbing.
The flow rate is usually set between 2.25 and 3 gpm per ton
of cooling capacity. For proper maintenance and servicing,
pressure-temperature (P/T) ports are necessary for temperature
and flow verification.
In addition to complying with any applicable codes, consid-
er the following for system piping:
• Piping systems using water temperatures below 50 F
require 1/2-in. closed cell insulation on all piping surfaces
to eliminate condensation.
• Avoid all plastic to metal threaded fittings due to the
potential to leak. Use a flange fitted substitute.
• Teflon tape thread sealant is recommended to minimize
internal fouling of the heat exchanger.
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
Fig. 16 — Trap Condensate Drain
• Use backup wrench. Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Flush the piping system prior to operation to remove dirt
and foreign materials from the system.
3/4” Copper FPT/PVC
3/4” PVC
Vent
GROUND-WATER APPLICATIONS (Not Applicable to
50RHC,RVC Units) — Typical ground-water piping is
shown in Fig. 18. In addition to complying with any appli-
cable codes, consider the following for system piping:
• Install shut-off valves for servicing.
• Install pressure-temperature plugs to measure flow and
temperature.
• Connect boiler drains and other valves using a “T” con-
nector to allow acid flushing for the heat exchanger.
• Do not overtighten connections.
1/2”
1/4” per foot
slope to drain
1/2”
Water
Connections
Alternate
Condensate
Location
• Route piping to avoid service access areas to unit.
• Use PVC SCH80 or copper piping material.
NOTE: PVC SCH40 should not be used due to system high
pressure and temperature extremes.
NOTE: Unit does not need to be sloped toward drain.
Fig. 17 — Vertical Condensate Connection
16
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Water Supply and Quantity — Check water supply. Water
supply should be plentiful and of good quality. See Table 4 for
water quality guidelines.
GROUND-LOOP APPLICATIONS (Not Applicable to
50RHC,RVC Units) — Temperatures between 25 to 110 F
and a cooling capacity of 2.25 to 3 gpm of flow per ton is rec-
ommended. In addition to complying with any applicable
codes, consider the following for system piping:
• Limit piping materials to only polyethylene fusion in the
buried sections of the loop.
IMPORTANT: Failure to comply with the above required
water quality and quantity limitations and the closed-
system application design requirements may cause damage
to the tube-in-tube heat exchanger that is not the responsi-
bility of the manufacturer.
• Do not use galvanized or steel fittings at any time due to
corrosion.
• Avoid all plastic to metal threaded fittings due to the
potential to leak. Use a flange fitted substitute.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use pressure-temperature (P/T) plugs to measure flow of
pressure drop.
In all applications, the quality of the water circulated
through the heat exchanger must fall within the ranges listed in
the Water Quality Guidelines table. Consult a local water treat-
ment firm, independent testing facility, or local water authority
for specific recommendations to maintain water quality within
the published limits.
Water
Control
Valve
Flow
Regulator
Pressure
Tank
Water Out
Water In
From Pump
Shut-Off
Valve
Strainer – Field-Installed Accessory
(16 to 20 mesh recommended for
filter sediment)
Boiler
Drains
Pressure-
Temperature
Plugs
Fig. 18 — Typical Ground-Water Piping Installation
Table 4 — Water Quality Guidelines
CONDITION
pH
ACCEPTABLE LEVEL
7 to 9 range for copper. Cupronickel may be used in the 5 to 9 range.
Total Hardness Calcium and magnesium carbonate should not exceed 20 grains per gallon (350 ppm).
Iron Oxides
Iron Bacteria
Corrosion*
Less than 1 ppm.
No level allowable.
Max Allowable Level
0.5 ppm
Coaxial Metal
Ammonia, Ammonium Hydroxide
Ammonium Chloride, Ammonium Nitrate
Ammonium Sulfate
Chlorine/Chlorides
Hydrogen Sulfide†
Cu
Cu
0.5 ppm
0.5 ppm
Cu
CuNi
—
0.5 ppm
None Allowable
Brackish
Use Cupronickel heat exchanger when concentrations of calcium or sodium chloride are greater
than 125 ppm are present. (Seawater is approximately 25,000 ppm.)
*If the concentration of these corrosives exceeds the maximum allowable level, then the potential for serious corrosion
problems exists.
†Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as the sample is taken.
Unless tested immediately at the site, the sample will require stabilization with a few drops of one Molar zinc acetate
solution, allowing accurate sulfide determination up to 24 hours after sampling. A low pH and high alkalinity cause sys-
tem problems, even when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality
of the water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral
water contains a pH of 7.0.
NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.
17
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Determine maximum deviation from average voltage:
Step 8 — Field Power Supply Wiring
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent voltage imbalance.
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position during installation.
7
% Voltage Imbalance = 100 x
457
= 1.53%
Use only copper conductors for field-installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors. Failure to follow this safety precaution
could lead to equipment damage.
This amount of phase imbalance is satisfactory as it is
below the maximum allowable 2%.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to electri-
cal components.
All field installed wiring, including the electrical ground,
MUST comply with the National Electrical Code (NEC) as
well as applicable local codes. In addition, all field wiring must
conform to the Class II temperature limitations described in the
NEC.
Refer to unit wiring diagrams Fig. 19-22 for a schematic of
the field connections, which must be made by the installing (or
electrical) contractor. Refer to Tables 5-7 for fuse sizes.
NOTE: If more than 2% voltage imbalance is present, contact
your local electric utility.
208-VOLT OPERATION — All 208-230 volt units are factory
wired for 208 volts. The transformers may be switched to
230-volt operation by switching the red (208 volt) wire with
the orange (230 volt) wire at the L1 terminal.
Consult the unit wiring diagram located on the inside of the
compressor access panel to ensure proper electrical hookup.
The installing (or electrical) contractor must make the field
connections when using field-supplied disconnect.
Operating voltage must be the same voltage and phase as
shown in Electrical Data shown in Tables 5-7.
Make all final electrical connections with a length of flexi-
ble conduit to minimize vibration and sound transmission to
the building.
Step 9 — Field Control Wiring
THERMOSTAT CONNECTIONS — The thermostat should
be wired directly to the Aquazone™ control board. See
Fig. 19-22, and 24.
WATER FREEZE PROTECTION — The Aquazone control
allows the field selection of source fluid freeze protection
points through jumpers. The factory setting of jumper JW3
(FP1) is set for water at 30 F. In earth loop applications, jumper
JW3 should be clipped to change the setting to 10 F when
using antifreeze in colder earth loop applications. See Fig. 25.
POWER CONNECTION — Make line voltage connection
by connecting the incoming line voltage wires to the L side
of the CC terminal as shown in Fig. 23. See Tables 5-7 for
correct wire and maximum overcurrent protection sizing.
SUPPLY VOLTAGE — Operating voltage to unit must be
within voltage range indicated on unit nameplate.
On 3-phase units, voltages under load between phases must
be balanced within 2%. Use the following formula to deter-
mine the percentage voltage imbalance:
AIR COIL FREEZE PROTECTION — The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting.
ACCESSORY CONNECTIONS — Terminal A on the control
is provided to control accessory devices such as water valves,
electronic air cleaners, humidifiers, etc. This signal operates
with the compressor terminal. See Fig. 26. Refer to the specific
unit wiring schematic for details.
% Voltage Imbalance
NOTE: The A terminal should only be used with 24 volt
signals — not line voltage signals.
max voltage deviation from average voltage
= 100 x
WATER SOLENOID VALVES — Water solenoid valves may
be used on primary secondary pump and ground water installa-
tions. A typical well water control valve wiring, which can
limit waste water in a lockout condition is shown in Fig. 26. A
slow closing valve may be required to prevent water hammer.
When using a slow closing valve, consider special wiring con-
ditions. The valve takes approximately 60 seconds to open
(very little water will flow before 45 seconds) and it activates
the compressor only after the valve is completely opened by
closing its end switch. When wired as shown, the valve will
have the following operating characteristics:
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 volts
BC = 464 volts
AC = 455 volts
452 + 464 + 455
Average Voltage =
3
1371
=
3
1. Remain open during a lockout
2. Draw approximately 25 to 35 VA through the “Y” signal
of the thermostat.
= 457
IMPORTANT: Connecting a water solenoid valve can
overheat the anticipators of electromechanical thermo-
stats. Only use relay based electronic thermostats.
18
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a50-8160
LEGEND
LOC
MV
NEC
P1
— Loss of Charge Pressure Switch
— Motorized Valve
AL
— Alarm Relay Contacts
— Blower Motor
Relay/Contactor Coil
BM
BMC
BR
CB
CC
CO
— National Electrical Code
— Field Wiring Terminal Block
— Performance Monitor
— Blower Motor Capacitor
— Blower Relay
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
PM
RV
— Circuit Breaker
— Compressor Contactor
— Sensor, Condensate Overflow
— Reversing Valve Coil
TRANS — Transformer
TXV
— Thermostatic Expansion Valve
COMPR — Compressor
FP1
FP2
HP
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
Ground
HWTS — High (Leaving) Water Temperature
Wire Nut
Switch
— Jumper, Alarm
JW1
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 265 v (BRN) lead for 265/1/60 units, or
208 v (RED) lead for 208/1/60. For 230/1/60 switch RED and
ORG leads at L1 and insulate RED lead. Transformer is energy
limiting or may have circuit breaker.
6. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper
and dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via control board standoffs and
screws to control box. (Ground available from top two standoffs
as shown.)
8. For high or low speed remove BLU wire from BR ‘NO’
and replace with BLK or RED wire respectively. Tape off unused
terminal.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Typical Aquazone thermostat wiring shown. Refer to thermostat
installation instructions for wiring to the unit. Thermostat wiring
must be Class 1 and voltage rating equal to or greater than unit
supply voltage.
9. Both DIP switches need to be in the ON position.
Fig. 19 — Typical Aquazone™ Complete C Control Wiring
19
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a50-8161
LEGEND
MV
— Motorized Valve
AL
— Alarm Relay Contacts
— Blower Motor
Relay/Contactor Coil
NEC
P1
— National Electrical Code
— Field Wiring Terminal Block
— Reversing Valve Solenoid
BM
BMC
BR
CB
CC
CO
— Blower Motor Capacitor
— Blower Relay
RVS
Condensate Pan
Solenoid Coil
Thermistor
Ground
TRANS — Transformer
— Circuit Breaker
— Compressor Contactor
— Sensor, Condensate Overflow
TXV
— Thermostatic Expansion Valve
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
COMPR — Compressor
FP1
FP2
HP
JW1
LOC
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
Wire Nut
— Jumper, Alarm
— Loss of Charge Pressure Switch
*Optional wiring.
6. 24-v alarm signal shown. For dry alarm contact, cut AL2 dry
jumper and dry contact will be available between AL1 and
AL2.
7. Transformer secondary ground via control board standoffs
and screws to control box. (Ground available from top two
standoffs as shown.)
8. Blower motor is factory wired for medium and high speeds.
For any other combination of speeds, attach the lower speed
wire to fan speed relay N.O. wire.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 208 v (RED) lead for 208/3/60. For 230/3/60
switch RED and ORG leads at L1 and insulate RED lead.
4. FP1 thermistor provides freeze protection for water. When using anti-
freeze solutions, cut JW3 jumper.
5. Typical Aquazone thermostat wiring shown. Refer to thermostat installa-
tion instructions for wiring to the unit. Thermostat wiring must be Class 1
and voltage rating equal to or greater than unit supply voltage.
Fig. 20 — Typical Aquazone™ Deluxe D Control Wiring
20
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a50-8153
LEGEND
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
AL
— Alarm Relay Contacts
— Blower Motor
Wire Nut
BM
BMC
BR
CB
CC
CO
— Blower Motor Capacitor
— Blower Relay
Relay Contacts - N.C.
— Circuit Breaker
— Compressor Contactor
— Sensor, Condensate Overflow
Relay Contacts - N.O.
Low Pressure Switch
High Pressure Switch
Splice Cap
Relay/Contactor Coil
COMPR — Compressor
FP1
FP2
HP
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
HPWS
JW1
LOC
LON
MV
— High Pressure Water Switch
— Clippable Field Selection Jumper
— Loss of Charge Pressure Switch
— Local Operating Network
— Motorized Valve
Circuit Breaker
Ground
NEC
P1
— National Electrical Code
— Field Wiring Terminal Block
— Power Block
PB
RVS
— Reversing Valve Solenoid
TRANS — Transformer
TXV
— Thermostatic Expansion Valve
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60 units, 575 v (GRY) lead for 575/3/60 units, or 380 v (VIO) lead for 380/3/50 units.
For 420/3/50 operation, switch VIO and BRN leads at L1 and insulate VIO lead. Transformer is energy limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must be Class 1 and volt-
age rating equal to or greater than unit supply voltage.
6. Factory cut JW1 jumper. Dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via Complete C board standoffs and screws to control box. (Ground available from top two standoffs as shown.)
8. Fan motors are factory wired for medium speed. For high or low speed, remove BLU wire from fan motor speed tap “M” and connect to “H” for
high speed or “L” for low speed.
9. For low speed, remove BLK wire from BR “6” and replace with RED. Connect BLK and BRN wires together.
10. Optional LON wires. Only connect if LON connection is desired at the wall sensor.
11. For blower motors with leads. For medium or low speed, diconnect BLK wire from BR “6”. Connect BLK and ORG/PUR wire together. Connect
RED for low or BLU for medium to BR “6”.
12. Blower motor is factory wired to medium speed. For low speed, remove BLU wire from medium tap and connect to low speed tap. For high
speed, remove BLU wire from existing speed tap and remove BRN jumperwire from high speed tap. Connect BLU wire to high speed tap. Tape
off unconnected end of BRN jumper.
Fig. 21 — Typical Aquazone™ Complete C and LON Controller Wiring
21
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a50-8154
LEGEND
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
AL
— Alarm Relay Contacts
— Blower Motor
BM
BMC
BR
CB
CC
CO
Wire Nut
— Blower Motor Capacitor
— Blower Relay
Relay Contacts - N.C.
Relay Contacts - N.O.
Low Pressure Switch
High Pressure Switch
Splice Cap
— Circuit Breaker
— Compressor Contactor
— Sensor, Condensate Overflow
Relay/Contactor Coil
COMPR — Compressor
FP1
FP2
HP
— Sensor, Water Coil Freeze Protection
— Sensor, Air Coil Freeze Protection
— High-Pressure Switch
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
HPWS
JW1
LOC
MV
— High Pressure Water Switch
— Clippable Field Selection Jumper
— Loss of Charge Pressure Switch
— Motorized Valve
Circuit Breaker
NEC
P1
RVS
— National Electrical Code
— Field Wiring Terminal Block
— Reversing Valve Solenoid
Ground
TRANS — Transformer
TXV
— Thermostatic Expansion Valve
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 460 v (BLK/RED) lead for 460/3/60 units, 575 v (GRY) lead for 575/3/60 units, or 380 v (VIO) lead for 380/3/50 units.
For 420/3/50 operation, switch VIO and BRN leads at L1 and insulate VIO lead. Transformer is energy limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must be Class 1 and volt-
age rating equal to or greater than unit supply voltage.
6. Factory cut JW1 jumper. Dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via Deluxe D board standoffs and screws to control box. (Ground available from top two standoffs as shown.)
8. Blower motor is factory wired for medium and high speeds. For any other combination of speeds, at the motor attach the BLK wire to the higher
of the two desired speed taps and the BLU wire to the lower of the two desired speed taps.
9. Blower motor is factory wired for high and low speeds. No other combination is available.
10. Optional LON wires. Only connect if LON connection is desired at the wall sensor.
Fig. 22 — Typical Aquazone™ Deluxe D and LON Controller Wiring
22
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a50-8162
Fig. 23 — 50RHC,RVC,RHR,RVR,RHS,RVS,RDS Typical Single-Phase
Line Voltage Power Connection
AQUAZONE CONTROL (C Control Shown)
Fig. 25 — Typical Aquazone Control Board
Jumper Locations
TERMINAL STRIP P2
NOTE: Low voltage connector may be removed for easy installation.
Fig. 24 — Low Voltage Field Wiring
C
TYPICAL
WATER
VALVE
24 VAC
A
Fig. 26 — Typical D Control Accessory Wiring
23
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Table 5 — 50RHC,RVC Electrical Data
COMPRESSOR
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
50RHC,RVC
UNITS
VOLTS-PHASE
60 Hz
VOLTAGE
MIN/MAX
MAX
FUSE/HACR
RLA
LRA
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
208/230-3
460-3
197/254
239/292
197/254
239/292
197/254
239/292
197/254
239/292
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
2.9
2.5
3.9
3.3
5.3
4.2
8.6
8.1
9.8
9.1
6.7
3.5
11.2
10.0
6.9
17.7
15.0
22.2
18.8
27.9
22.2
49.0
44.0
56.0
55.0
51.0
25.0
61.0
58.0
55.0
28.0
82.0
83.0
70.0
33.0
96.0
75.0
40.0
34.0
105.0
85.0
42.0
31.0
102.0
91.0
42.0
39.0
170.0
124.0
59.6
49.4
0.40
0.35
0.80
0.70
0.80
0.70
1.00
0.86
1.50
1.30
1.50
0.76
3.00
2.70
3.00
1.70
1.80
2.00
1.80
1.24
3.00
3.00
1.70
1.40
3.00
3.00
1.70
1.50
3.40
3.40
1.80
1.40
4.30
4.30
2.50
1.90
3.3
2.8
4.7
4.0
6.1
4.9
9.6
8.9
4.1
3.5
5.7
4.8
7.5
15
15
15
15
15
15
20
15
20
20
15
15
25
25
15
15
35
30
20
15
35
25
15
15
40
25
15
15
40
30
15
15
60
35
15
15
006*
009
012
018
6.0
11.7
11.0
13.8
12.7
9.9
11.3
10.4
8.2
024
030
036
041†
042
048
060
4.2
5.1
14.2
12.7
9.9
16.9
15.2
11.7
6.2
21.1
20.0
13.8
7.4
3.6
5.3
15.4
14.4
9.6
17.2
16.4
11.4
6.1
19.2
13.3
6.0
4.9
16.2
10.3
4.3
23.2
15.8
7.1
575-3
4.3
5.7
6.8
208/230-1
208/230-3
460-3
17.1
10.7
5.3
20.1
13.7
7.0
24.3
16.4
8.3
575-3
3.7
5.2
6.1
208/230-1
208/230-3
460-3
18.3
12.6
5.7
21.7
16.0
7.5
26.3
19.2
8.9
575-3
4.7
6.1
7.2
208/230-1
208/230-3
460-3
25.6
14.7
7.4
29.9
19.0
9.9
36.4
22.7
11.8
9.3
575-3
5.9
7.8
LEGEND
— Full Load Amps
*Size 006 available in 50RHC unit only.
†Size 041 available in 50RVC unit only.
FLA
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
NOTES:
1. HACR circuit breaker in U.S.A. only.
2. All fuses Class RK-5.
RLA — Rated Load Amps
24
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Table 6 — 50RHR,RVR Electrical Data
COMPRESSOR
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
50RHR,RVR
UNITS
VOLTS-PHASE
60 Hz
VOLTAGE
MIN/MAX
MAX
FUSE/HACR
RLA
LRA
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
208/230-3
460-3
197/254
239/292
197/254
239/292
197/254
239/292
197/254
239/292
197/254
239/292
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
2.9
2.5
3.9
3.3
5.3
4.2
5.9
5.4
7.9
7.1
8.7
8.3
6.0
17.7
15.0
22.2
18.8
27.9
22.2
29.0
27.0
48.3
41.0
48.3
47.0
50.0
25.0
60.0
58.0
50.0
25.0
84.0
83.0
63.4
36.0
96.0
75.0
40.0
31.0
102.0
91.0
42.0
39.0
170.0
124.0
59.6
49.4
0.40
0.35
0.80
0.90
0.80
0.90
1.00
0.86
1.10
0.90
1.30
1.58
1.30
0.85
1.90
1.66
1.90
1.00
3.00
2.70
3.00
1.70
3.00
3.00
1.70
1.50
3.40
3.40
1.80
1.60
4.30
4.30
2.50
2.20
3.3
2.8
4.7
4.2
6.1
5.1
6.9
6.3
9.0
8.0
10.0
9.9
7.3
4.1
13.1
11.9
8.3
4.0
3.5
5.7
5.0
7.5
6.2
8.4
7.7
11.0
9.7
15
15
15
15
15
15
15
15
15
15
20
20
15
15
25
20
15
15
30
30
20
15
35
25
15
15
40
30
15
15
60
35
15
15
006*
009
012
015
019
12.1
12.0
8.8
024
030
036
042
048
060
3.2
4.9
11.2
10.3
6.4
15.9
14.5
9.9
3.2
4.2
5.0
14.1
13.5
8.2
17.1
16.2
11.2
5.8
19.2
13.3
6.0
20.6
19.5
13.3
6.8
23.2
15.8
7.1
4.1
16.2
10.3
4.3
575-3
3.7
5.2
6.1
208/230-1
208/230-3
460-3
18.3
12.6
5.7
21.7
16.0
7.5
26.2
19.2
8.9
575-3
4.7
6.3
7.5
208/230-1
208/230-3
460-3
25.6
14.7
7.4
29.9
19.0
9.9
36.4
22.7
11.8
9.8
575-3
5.9
8.1
LEGEND
— Full Load Amps
FLA
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
RLA — Rated Load Amps
*Size 006 is available in 50RHR units only.
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Table 7 — 50RDS, RHS, RVS Electrical Data
COMPRESSOR
UNITS WITH HWR
MIN
50RDS,
RHS,
RVS
VOLTS-
PHASE
60 Hz
FAN
MOTOR
FLA
TOTAL
UNIT
FLA
MIN
CIRCUIT
AMP
VOLTAGE
MIN/MAX
MAX
REHEAT TOTAL
MAX
FUSE/HACR
RLA
LRA
PUMP
FLA
UNIT CIRCUIT FUSE /
UNIT
FLA
6.7
AMP
7.9
HACR
15
15
15
15
25
20
20
15
25
25
15
15
30
25
15
15
30
30
20
15
30
30
25
15
35
25
15
N/A
45
30
15
N/A
60
40
15
N/A
70
40
20
N/A
208/230-1
265-1
208/230-1
265-1
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
197/254
239/292
197/254
239/292
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
4.9
4.4
7.1
5.5
10.3
8.7
7.1
3.5
12.2
10.9
7.7
26.0
28.0
38.0
32.0
56.0
47.0
45.0
22.4
67.0
56.0
55.0
27.0
67.0
56.0
55.0
27.0
73.0
71.0
63.0
31.0
73.0
71.0
63.0
31.0
95.0
77.0
39.0
31.0
109.0
88.0
44.0
34.0
169.0
123.0
49.5
40.0
169.0
137.0
62.0
49.0
1.00
0.86
1.00
0.86
1.10
0.90
1.10
0.57
1.30
1.58
1.30
0.85
1.30
1.58
1.30
0.85
1.80
2.00
1.80
1.24
1.80
2.00
1.80
1.24
1.90
1.90
1.00
0.80
3.00
3.00
1.70
1.50
3.40
3.40
1.80
1.60
4.30
4.30
2.50
2.20
5.9
5.2
8.1
6.4
11.4
9.6
8.2
4.1
13.5
12.5
9.0
7.2
6.3
9.8
15
15
15
15
20
20
15
15
25
25
15
15
25
25
15
15
30
30
20
15
30
30
20
15
35
25
15
15
40
30
15
15
50
40
15
15
60
40
20
15
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
015
018
8.0
7.1
8.9
7.1
10.7
8.5
7.8
13.9
11.7
9.9
12.8
10.6
9.0
15.5
12.9
10.8
5.7
024
030
5.0
4.8
16.5
15.2
10.9
5.7
16.5
15.2
10.9
5.7
18.6
18.0
13.8
6.8
18.6
18.0
13.8
6.8
14.3
13.2
9.8
17.4
15.9
11.7
6.4
3.8
4.7
5.4
12.2
10.9
7.7
13.5
12.5
9.0
14.8
13.6
10.3
5.8
17.9
16.3
12.2
6.8
030
HIGH
STATIC
3.8
4.7
13.5
12.8
9.6
15.3
14.8
11.4
5.7
15.3
14.8
11.4
5.7
16.1
15.5
12.2
6.5
19.5
18.7
14.6
7.6
036
4.5
13.5
12.8
9.6
17.3
16.2
13.4
6.9
20.7
19.4
15.8
8.0
036
HIGH
STATIC
4.5
208/230-1
208/230-3
460-3
16.5
10.3
5.1
18.4
12.2
6.1
22.6
14.7
7.4
19.2
13.0
6.8
23.3
15.6
8.1
0.8
0.7
042
048
060
070
575-3
4.2
5.0
6.1
N/A
1.07
1.07
1.07
N/A
1.07
1.07
1.07
N/A
1.07
1.07
1.07
N/A
N/A
22.4
16.5
9.2
N/A
29.5
21.8
9.6
N/A
34.8
23.3
12.6
N/A
N/A
26.9
19.6
10.8
N/A
35.7
26.1
11.2
N/A
42.0
27.6
14.8
N/A
208/230-1
208/230-3
460-3
18.3
12.4
6.4
21.3
15.4
8.1
25.9
18.5
9.7
575-3
4.8
6.3
7.5
208/230-1
208/230-3
460-3
25.0
17.3
6.7
28.4
20.7
8.5
34.6
25.0
10.2
8.8
40.4
25.9
13.7
10.5
575-3
5.8
7.4
208/230-1
208/230-3
460-3
28.8
17.3
9.0
33.1
21.6
11.5
8.8
575-3
6.6
LEGEND
FLA
— Full Load Amps
LRA
RLA
—
—
Locked Rotor Amps
Rated Load Amps
HACR — Heating, Air Conditioning and Refrigeration
HWR — Hot Water Reheat
7. Isolation valves are open.
PRE-START-UP
8. Water control valves or loop pumps are wired.
9. Condensate line is open and correctly pitched.
10. Transformer switched to lower voltage tap if necessary.
11. Blower rotates freely — shipping support is removed.
12. Blower speed is on correct setting.
13. Air filter is clean and in position.
14. Service/access panels are in place.
15. Return-air temperature is between 40 to 80 F heating and
50 to 110 F cooling.
16. Air coil is clean.
System Checkout — When the installation is complete,
follow the system checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor and voltage is balanced
for 3 phase units.
2. Fuses, breakers and wire are correct size.
3. Low voltage wiring is complete.
4. Piping and system flushing is complete.
5. Air is purged from closed loop system.
6. System is balanced as required. Monitor if necessary.
17. Control field selected settings are correct.
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AIR COIL — To obtain maximum performance, clean the air
coil before starting the unit. A ten percent solution of dish-
washer detergent and water is recommended for both sides of
the coil. Rinse thoroughly with water.
CONNECT THE BLUE WIRE TO:
H FOR HIGH SPEED FAN
M FOR MEDIUM SPEED FAN
L FOR LOW SPEED FAN
PSC (Permanent Split Capacitor) Blower
Speed Selection — All water source heat pumps are
factory set to deliver rated airflow at nominal static (0.15 in.
wg) on medium speed. Where higher static is needed, high
speed can be utilized (0.4 to 0.5 in. wg). Low speed will
deliver approximately 85% of rated airflow (0.10 in. wg). The
PSC blower fan speed can be changed on all units by swapping
wires connected to the relay contacts that control the fan. See
Fig. 27.
BLU
MEDIUM FACTORY SETTING
M
L
H
FOR 50RHR,RVR,RHS,RVS AND RDS UNITS — On the
control, the black wire is connected to High, blue wire is
connected to Medium and red wire is connected to Low. See
Fig. 19-22.
FAN MOTOR
Fig. 27 — 50RHC,RVC Blower Speed Selection
NOTE: Available airflows for all units are shown in Tables 8-13.
FOR 50RHC,RVC UNITS — The PSC blower fan speed
can be changed by moving the blue wire on the fan motor ter-
minal block to the desired speed as shown in Fig. 27. The
50RHC,RVC units are designed to deliver rated airflow at
nominal static (0.15 in. wg) on medium speed (factory setting)
and rated airflow at a higher static (0.4 to 0.5 in. wg) on high
speed for applications where higher static is required. Low
speed will deliver approximately 85% of rated airflow at
0.10 in. wg. An optional ‘High Static’ blower is available by
using the special option code in the model nomenclature.
Table 8 — 50RHR,RVR Blower Performance
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90
50RHR,RVR RATED MIN
FAN
UNITS
006*
009
012
015
019
024
030
036
042
048
CFM
CFM SPEED
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
HI
MED
LO
300 290 280 270 260 250 240 230 210 190 160 110
240 230 220 210 200 190 180 160 140 130 110
220 210 200 200 190 180 160 150 130 130
450 440 430 420 400 390 370 350 320 310 300 230
410 400 390 380 360 350 340 330 310 290 270
370 360 350 340 320 320 310 300 280 260 240
470 460 450 440 430 420 400 390 380 370 350 330 290
410 400 380 370 360 360 350 340 330 320 310 290
340 330 320 320 310 310 300 300 290 290
750 730 710 700 680 660 630 600 570 540 500 400
660 640 620 610 590 570 550 530 500 470 440 370
580 570 550 540 520 500 480 460 430 400 370
850 820 790 770 740 710 670 640 600 560 520 450
700 680 660 640 620 590 560 530 500 470 440
600 580 560 540 510 490 460 460
980 950 920 890 860 830 790 760 720 680 640 540
850 830 800 770 740 720 690 660 620 580 540 460
700 680 660 650 630 610 590 560 530 500 470
1330 1300 1260 1230 1190 1150 1100 1050 1000 960 920 830
1210 1190 1160 1130 1100 1050 1000 970 930 880 830 720
1050 1030 1010 980 950 920 890 850 810 770 730
1580 1540 1500 1470 1440 1410 1370 1330 1280 1240 1200 1090 940
1400 1370 1340 1310 1280 1250 1220 1190 1150 1100 1050 920
1100 1080 1060 1040 1010 980 950 920 890 890
1790 1760 1730 1700 1660 1630 1590 1550 1510 1480 1440 1370 1270 1120
1500 1490 1470 1450 1420 1400 1380 1350 1320 1300 1270 1180 1070
1110 1100 1090 1080 1060 1050 1040
1910 1880 1840 1800 1750 1730 1700 1650 1600 1540 1480 1380 1300 1180
1830 1790 1740 1700 1660 1620 1570 1540 1500 1450 1400 1320 1210 1120
1700 1670 1640 1600 1560 1530 1490 1460 1430 1390 1340 1250 1170
2180 2140 2090 2060 2030 1990 1940 1870 1800 1750 1690 1580 1440 1270 990
2080 2050 2020 1970 1920 1870 1820 1740 1650 1640 1620 1530 1320 1220 910
1990 1950 1910 1880 1840 1810 1770 1710 1650 1620 1580 1460 1340 1180
2230 2220 2200 2160 2120 2090 2060 2040 2010 1990 1960 1880 1790 1660
2040 2020 1990 1970 1940 1920 1890 1860 1830 1810 1780 1710 1620
1840 1830 1810 1800 1780 1760 1730 1700 1670 1640 1600 1510
200
150
225
300
375
300
500
375
600
450
800
600
1000
1200
1400
1600
1600
2000
750
900
1050
1200
1200
1500
High Static
048
HI
MED
LO
060
LEGEND
NOTES:
1. Units factory shipped on medium speed. Other speeds require
Shaded areas are below minimum CFM. This data is
provided for troubleshooting information only.
CFM — Cubic Feet Per Minute
field selection.
2. All airflow is rated on 208 v operating with wet coil and clean air
filter.
3. All units ARI/ISO/ASHRAE 13256-1 rated on high fan speed.
4. Only two-speed fan (H & M) available on 575-v units.
*Size 006 available in 50RHR units only.
27
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Table 9 — 50RHC,RVC Blower Performance
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.0 1.10 1.20 1.30
50RHC,RVC RATED MIN
FAN
UNITS
CFM CFM SPEED
HI
310 300 290 280 270 250 230 210 180
260 250 240 230 210 200 190 150
210 200 190 180 160 150
410 400 380 360 350 330 320 300 280
390 370 360 340 320 310 290 280 260
340 330 322 310 300 280 260 250 220
470 460 450 440 430 420 400 390 380 320
420 410 400 390 380 370 360 350 340
360 360 350 340 320 320 310 300 290
006*
220
325
150 MED
LO
HI
225 MED
LO
HI
300 MED
LO
HI
450 MED
LO
009
012
018
400
760 740 720 710 700 680 650 600 550 460
700 690 680 670 660 650 630 620 600 560 520 430
620 610 600 590 580 570 560 540 520 490 460
600
HI
450 MED
LO
790 780 770 760 750 730 710 690 650 530 430
750 740 720 710 700 690 670 670 660 650 630 600 490 390
670 660 640 630 620 610 600 590 580 580 570 530 420
018
High Static
600
HI
1000 970 930 870 770 690
024
800
600 MED 1010 1000 990 980 960 940 920 900 880 860 830 770 700 600
LO
820 810 800 790 780 770 760 750 730 720 700 650 600
HI
600 MED
LO
1030 950 840 700
024
High Static
800
1040 1010 970 890 750 620
1030 1010 980 960 930 900 870 790 710
HI
1160 1130 1100 1070 1030 950 840
030
1000
1000
1200
1200
1325
750 MED 1250 1230 1200 1180 1150 1120 1090 1070 1040 1010 970 890 750
LO
1120 1100 1070 1050 1030 1010 980 960 930 900 870 790 710
1160 1040 920 800 750
1130 1080 1030 930 820 750
980 960 940 910 880 840 750
1520 1500 1480 1460 1430 1400 1370 1350 1320 1270 1210 1110 960 840
HI
750 MED
LO
030
High Static
1050 1040 1030 1010 990
HI
036
900 MED 1150 1150 1140 1140 1130 1130 1120 1110 1100 1070 1040 940
LO
HI
1010 1010 1000 1000 990 990 980 980 970 950 930
1530 1500 1470 1400 1290 1170 960
036
High Static
900 MED 1360 1350 1340 1330 1320 1310 1300 1280 1260 1250 1230 1150 1070 910
LO
HI
1030 1020 1010 1010 1000 1000 990 980 960 950 930
1380 1370 1350 1330 1300 1260 1220 1170 1120 1080 1040 890
041†
042
950 MED 1230 1220 1200 1190 1180 1150 1120 1080 1030 990 950
LO
HI
1040 1030 1010 1000 990 970 950
1640 1610 1580 1550 1520 1490 1450 1410 1370 1330 1290 1190 1100
1350 1050 MED 1490 1470 1440 1420 1390 1370 1340 1310 1270 1230 1190 1120 1010
LO
HI
1140 1140 1130 1130 1120 1110 1100 1080 1060 1010
1550 1540 1520 1500 1470 1460 1450 1380 1240 1080
042
High Static
1350 1050 MED 1390 1380 1370 1360 1350 1340 1320 1310 1300 1280 1250 1180 1080
LO
HI
1980 1950 1910 1860 1800 1740 1680 1490 1280 1280
048
1600 1200 MED 1940 1920 1900 1880 1860 1820 1770 1740 1710 1660 1600 1410 1000
LO
HI
1770 1750 1730 1710 1690 1670 1650 1610 1570 1510 1450 1330
2060 2040 2010 1960 1880 1790 1660 1510
048
High Static
1600 1200 MED 2050 2050 2040 2020 1990 1970 1940 1920 1890 1860 1830 1780 1710 1620 1490 1320
LO
HI
1850 1850 1840 1830 1810 1800 1780 1760 1730 1700 1670 1600 1510 1380 1220
2240 2240 2230 2220 2200 2160 2120 2090 2060 2040 2010 1960 1880 1790 1660 1510
060
2000 1500 MED 2050 2050 2040 2020 1990 1970 1940 1920 1890 1860 1830 1780 1710 1620 1490
LO
HI
1850 1850 1840 1830 1810 1800 1780 1760 1730 1700 1670 1600 1510
2400 2400 2390 2380 2370 2360 2340 2320 2300 2270 2240 2200 2130 2060 1980 1890 1790 1660 1500
060
High Static
2000 1500 MED 2160 2160 2150 2150 2140 2110 2080 2060 2040 2030 2020 1980 1930 1880 1490 1750 1660 1530
LO
1930 1930 1920 1920 1910 1900 1890 1890 1880 1870 1850 1830 1800 1750 1700 1620 1530
*Size 006 is available in 50RHC unit only.
†Size 041 is available in 50RVC unit only.
NOTES:
1. Gray areas denote ESP (external static pressure) where operation is not
recommended.
5. Only two-speed fan (H & M) available on 575-v units.
6. For wet coil performance first calculate the face velocity of the air
coil (Face Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for veloci-
ties of 200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by
0.08 in. wg, 400 fpm by 0.12 in. wg, and 500 fpm by 0.16 in. wg.
7. Airflow in cfm with net dry coil and clean air filter.
2. Units factory shipped on medium speed. Other speeds require field
selection.
3. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v
for 208-230 v units.
4. All units ARI/ISO/ASHRAE 13256-1 rated on high fan speed.
Table 10 — 50RVC Blower Performance with Hot Water Reheat (HWR) Option
REHEAT EXTERNAL STATIC PRESSURE (ESP) LOSS
COIL FACE VELOCITY
(fpm)
018, 024, 030
(in. wg)
036, 042
(in. wg)
048, 060
(in. wg)
200
250
300
350
400
450
500
0.060
0.070
0.090
0.124
0.164
0.252
0.380
0.049
0.055
0.068
0.091
0.129
0.221
0.350
0.038
0.040
0.045
0.059
0.094
0.189
0.320
NOTE: For 50RVC units with HWR, calculate coil face velocity of the entering air. Find the
external static pressure loss for the reheat application. This loss includes the wet coil loss.
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Table 11 — 50RVC Blower Performance with Wet Coil
COIL FACE VELOCITY
(fpm)
WET COIL REDUCTION
(in. wg)
200
250
300
350
400
450
500
0.030
0.055
0.080
0.100
0.120
0.140
0.160
Table 12 — 50RHS,RVS,RDS Blower Performance
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00
50RHS,RVS,RDS RATED
FAN
UNITS
AIRFLOW SPEED
Hi
880 860 840 830 820 800 780 750 730 690 660 610
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
015
500
600
Med
Low
Hi
Med
Low
Hi
Med
Low
Hi
Med
Low
770 760 750 740 720 710 690 670 640 620 600
670 660 660 650 640 630 620 600 580 550 520
—
—
870 860 840 830 820 800 780 750 730 690 660 610
018
024
030
770 760 750 740 720 710 690 670 640 620 600
670 660 660 650 640 630 620 600 580 550 520
—
—
1130 1110 1090 1060 1040 1010 980 950 920 880 840 720
800
950 940 930 920 910 880 860 820 790 760 730
880 870 860 840 830 810 800 770 730 700 660
—
—
1240 1230 1200 1180 1160 1120 1090 1050 1000 970 930 850 650
1000
1000
1150
1150
1400
1600
2000
2300
1180 1150 1120 1090 1070 1030 1000 970 950 910 870
1040 1020 1000 980 960 930 910 870 840 820 790
—
—
—
—
HS Hi 1380 1360 1320 1280 1250 1220 1200 1150 1110 1070 1020 940 850 690
HS Med 1260 1240 1220 1190 1170 1130 1100 1070 1040 990 950
HS Low 1170 1150 1130 1100 1080 1050 1020 990 960 930 900
Hi
Med
Low
HS Hi 1790 1760 1730 1700 1660 1630 1590 1550 1510 1470 1440 1370 1270 1120
HS Med 1510 1490 1470 1450 1420 1400 1380 1350 1320 1300 1270 1180 1070
HS Low 1110 1100 1090 1080 1060 1050 1040
Hi Static
030
—
—
—
—
—
—
1390 1360 1320 1280 1250 1220 1200 1150 1110 1070 1020 940 850 690
036
1260 1240 1220 1190 1170 1130 1100 1070 1040 990 950
1170 1150 1130 1100 1080 1050 1020 990 960 930 900
—
—
—
—
—
—
Hi Static
036
—
—
—
—
—
—
—
—
—
—
—
Hi
—
—
—
1670 1630 1600 1570 1540 1510 1440 1380 1290 1130
042
048
060
Med
Low
Hi
Med
Low
Hi
1610 1580 1550 1510 1480 1450 1420 1390 1360 1320 1270
1270 1260 1250 1240 1220 1210 1190 1160 1120 1080 1030
—
—
—
—
—
—
—
2010 2000 1940 1880 1830 1780 1690 1610 1540 1310 1190
1940 1910 1870 1820 1780 1740 1700 1670 1630 1570 1520 1410 1310 1170
1470 1460 1450 1440 1430 1410 1380 1360 1330 1280 1220 1110 1040
2270 2230 2200 2170 2140 2110 2040 1970 1870 1720 1640
—
—
—
—
—
—
Med
Low
Hi
Med
Low
2260 2240 2220 2190 2170 2140 2110 2100 2080 2050 2020 1960 1870 1760 1660 1550
2050 2030 2010 1990 1970 1950 1930 1910 1880 1850 1830 1780 1700 1650 1570 1430
—
—
—
—
—
2460 2430 2390 2340 2310 2280 2230 2180 1990 1860 1740
070
2530 2500 2470 2450 2420 2400 2370 2340 2310 2280 2260 2200 2100 1890 1740 1640
2270 2260 2250 2240 2230 2210 2180 2160 2140 2120 2100 2040 1900 1790 1690 1570
LEGEND
— — Not Recommended
NOTES:
1. Includes allowance for wet coil and clean factory-installed filter.
2. Units factory shipped on medium speed (015 on Low). Other speeds require field selection.
3. All airflow is rated on 208 v operating with wet coil and clean air filter.
4. All units ARI/ISO/ASHRAE 13256-1 rated on high (015 rated on medium).
29
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Table 13 — 50RHS, RVS Blower Performance with HWR
50RHS, RVS WITH REHEAT ESP LOSS
COIL FACE
VELOCITY (FPM)
50RHS, RVS
015, 018 (in. wg)
50RHS, RVS
024, 030 (in. wg)
50RHS, RVS
036 (in. wg)
50RHS, RVS
042, 048 (in. wg)
50RHS, RVS
060 (in. wg)
50RHS, RVS
070 (in. wg)
200
250
300
350
400
450
500
0.040
0.059
0.088
0.131
0.203
0.258
0.375
0.037
0.052
0.077
0.113
0.181
0.242
0.360
0.033
0.046
0.066
0.096
0.160
0.226
0.345
0.031
0.042
0.059
0.085
0.145
0.215
0.335
0.028
0.038
0.051
0.073
0.131
0.205
0.326
0.026
0.034
0.044
0.061
0.117
0.194
0.316
LEGEND
ESP — External Static Pressure
HWR — Hot Water Reheat
FIELD SELECTABLE INPUTS
to R, do not clip the jumper. To set as dry contact, clip the
jumper.
Jumpers and DIP (dual in-line package) switches on the
control board are used to customize unit operation and can be
configured in the field.
LOW PRESSURE SETTING — The D Control can be con-
figured for Low Pressure Setting (LP). Select jumper 1 (JW1-
LP Norm Open) for choosing between low pressure input nor-
mally open or closed. To configure for normally closed opera-
tion, do not clip the jumper. To configure for normally open op-
eration, clip the jumper.
IMPORTANT: Jumpers and DIP switches should only
be clipped when power to control board has been turned
off.
D Control DIP Switches — The D Control has 2 DIP
switch blocks. Each DIP switch block has 8 switches and is
labeled either S1 or S2 on the circuit board. See Fig. 20.
DIP SWITCH BLOCK 1 (S1) — This set of switches offers
the following options for D Control configuration:
Performance Monitor (PM) — Set switch 1 to enable or dis-
able performance monitor. To enable the PM, set the switch to
ON. To disable the PM, set the switch to OFF.
Compressor Relay Staging Operation — Switch 2 will en-
able or disable compressor relay staging operation. The com-
pressor relay can be set to turn on with stage 1 or stage 2 call
from the thermostat. This setting is used with dual stage units
(units with 2 compressors and 2 D controls) or in master/slave
applications. In master/slave applications, each compressor and
fan will stage according to its switch 2 setting. If switch is set to
stage 2, the compressor will have a 3-second delay before ener-
gizing during stage 2 demand.
C Control Jumper Settings (See Fig. 19)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,
DO NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT
clip the jumper. To select 10 F as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 1 (JW1-AL2
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R)
or to remain as a dry contact (no connection). To connect AL2
to R, do not clip the jumper. To set as dry contact, clip the
jumper.
C Control DIP Switches — The C Control has 1 DIP
switch block with two switches. See Fig. 19.
NOTE: If DIP switch is set for stage 2, the alarm relay will not
cycle during Test mode.
PERFORMANCE MONITOR (PM) — DIP switch 1 will
enable or disable this feature. To enable the PM, set the switch
to ON. To disable the PM, set the switch to OFF.
STAGE 2 — DIP switch 2 will enable or disable compressor
delay. Set DIP switch to OFF for stage 2 in which the compres-
sor will have a 3-second delay before energizing.
Heating/Cooling Thermostat Type — Switch 3 provides selec-
tion of thermostat type. Heat pump or heat/cool thermostats
can be selected. Select OFF for heat/cool thermostats. When in
heat/cool mode, Y1 is used for cooling stage 1, Y2 is used for
cooling stage 2, W1 is used for heating stage 1 and O/W2 is
used for heating stage 2. Select ON for heat pump applications.
In heat pump mode, Y1 used is for compressor stage 1, Y2 is
used for compressor stage 2, W1 is used for heating stage 3 or
emergency heat, and O/W2 is used for RV (heating or cooling)
depending upon switch 4 setting.
O/B Thermostat Type — Switch 4 provides selection for heat
pump O/B thermostats. O is cooling output. B is heating out-
put. Select ON for heat pumps with O output. Select OFF for
heat pumps with B output.
NOTE: The alarm relay will not cycle during Test mode if
switch is set to OFF, stage 2.
D Control Jumper Settings (See Fig. 20)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,
DO NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
Dehumidification Fan Mode — Switch 5 provides selection
of normal or dehumidification fan mode. Select OFF for dehu-
midification mode. The fan speed relay will remain OFF dur-
ing cooling stage 2. Select ON for normal mode. The fan speed
relay will turn on during cooling stage 2 in normal mode.
Switch 6 — Not used.
Boilerless Operation — Switch 7 provides selection of boiler-
less operation and works in conjunction with switch 8. In
AIR COIL FREEZE PROTECTION (FP2) LIMIT SET-
TING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT
clip the jumper. To select 10 F as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 4 (JW4-AL2
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R)
or to remain as a dry contact (no connection). To connect AL2
30
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boilerless operation mode, only the compressor is used for
heating when FP1 is above the boilerless changeover tempera-
ture set by switch 8 below. Select ON for normal operation or
select OFF for boilerless operation.
Boilerless Changeover Temperature — Switch 8 on S1 pro-
vides selection of boilerless changeover temperature set point.
Select OFF for set point of 50 F or select ON for set point
of 40 F.
If switch 8 is set for 50 F, then the compressor will be used
for heating as long as the FP1 is above 50 F. The compressor
will not be used for heating when the FP1 is below 50 F and the
compressor will operates in emergency heat mode, staging on
EH1 and EH2 to provide heat. If a thermal switch is being used
instead of the FP1 thermistor, only the compressor will be used
for heating mode when the FP1 terminals are closed. If the FP1
terminals are open, the compressor is not used and the control
goes into emergency heat mode.
DIP SWITCH BLOCK 2 (S2) — This set of DIP switches is
used to configure accessory relay options. See Fig. 20.
Switches 1 to 3 — These DIP switches provide selection
of Accessory 1 relay options. See Table 14 for DIP switch
combinations.
Switches 4 to 6 — These DIP switches provide selection
of Accessory 2 relay options. See Table 15 for DIP switch
combinations.
valve ("O" signal) is energized in cooling, along with the com-
pressor contactor(s) and blower relay. In the heating mode, the
reversing valve is deenergized. Almost any thermostat will
activate the heat pump in heating or cooling modes. The
Deluxe D microprocessor board, which is standard with the
HWR option, will accept either heat pump (Y,O) thermostats
or non-heat pump (Y,W) thermostats.
The reheat mode requires either a separate humidistat/
dehumidistat or a thermostat that has an integrated dehumidifi-
cation function for activation. The Deluxe D board is config-
ured to work with either a humidistat or dehumidistat input to
terminal “H” (DIP switch settings for the Deluxe D board are
shown in Table 16). Upon receiving an “H” input, the Deluxe
D board will activate the cooling mode and engage reheat.
Table 16 — Humidistat/Dehumidistat Logic and
Deluxe D DIP Switch Settings
Reheat
Reheat
Sensor
2.1 2.2 2.3
Logic
(ON) - H (OFF) - H
Humidistat
Off Off Off Reverse
Dehumidistat Off On Off Standard 24 VAC
0 VAC
24 VAC
0 VAC
Table 17 shows the relationship between thermostat input
signals and unit operation. There are four operational inputs for
single stage units and six operational inputs for dual stage
units:
• Fan Only
Table 14 — DIP Switch Block S2 —
Accessory 1 Relay Options
• Cooling Stage 1
• Cooling Stage 2
• Heating Stage 1
• Heating Stage 2
• Reheat Mode
DIP SWITCH POSITION
ACCESSORY 1
RELAY OPTIONS
1
2
3
Cycle with Fan
Digital NSB
Water Valve — Slow Opening
OAD
On
Off
On
On
On
On
Off
On
On
On
On
Off
MODULATING HWR APPLICATION CONSIDER-
ATIONS — Unlike most hot gas reheat options, the mod-
ulating HWR option (RVC,RHS,RVS,RDS only) will oper-
ate over a wide range of entering-water temperatures
(EWTs). Special flow regulation (water regulating valve) is
not required for low EWT conditions. However, below 55 F,
supply-air temperatures cannot be maintained at 72 F
because the cooling capacity exceeds the reheat coil capac-
ity at low water temperatures. Below 55 F, essentially all
water is diverted to the reheat coil (no heat of rejection to
the building loop). Although the HWR option will work fine
with low EWTs, overcooling of the space may result with
well water systems or, on rare occasions, with ground loop
(geothermal) systems (NOTE: Extended range units are
required for well water and ground loop systems). Since
dehumidification is generally only required in cooling, most
ground loop systems will not experience overcooling of the
supply-air temperature. If overcooling of the space is a con-
cern (e.g., computer room well water application), auxiliary
heating may be required to maintain space temperature
when the unit is operating in the dehumidification mode.
Water source heat pumps with HWR should not be used as
makeup air units. These applications should use equipment
specifically designed for makeup air.
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other DIP switch combinations are invalid.
Table 15 — DIP Switch Block S2 —
Accessory 2 Relay Options
DIP SWITCH POSITION
ACCESSORY 2
RELAY OPTIONS
4
5
6
Cycle with Fan
Digital NSB
Water Valve — Slow Opening
OAD
On
Off
On
On
On
On
Off
On
On
On
On
Off
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other switch combinations are invalid.
HWR COMPONENT FUNCTIONS — The proportional
controller operates on 24 VAC power supply and automatically
adjusts the water valve based on the supply-air sensor. The
supply-air sensor senses supply-air temperature at the blower
inlet, providing the input signal necessary for the proportional
control to drive the motorized valve during the reheat mode of
operation. The motorized valve is a proportional actuator/three-
way valve combination used to divert the condenser water
from the coax to the hydronic reheat coil during the reheat
mode of operation. The proportional controller sends a signal
to the motorized valve based on the supply-air temperature
reading from the supply air sensor.
Auto Dehumidification Mode or High Fan Mode — Switch 7
provides selection of auto dehumidification fan mode or high
fan mode. In auto dehumidification fan mode the fan speed
relay will remain off during cooling stage 2 if terminal H is
active. In high fan mode, the fan enable and fan speed relays
will turn on when terminal H is active. Set the switch to ON for
auto dehumidification fan mode or to OFF for high fan mode.
Switch 8 — Not used.
Units with Modulating Hot Water Reheat
(HWR) Option — A heat pump equipped with Hot Water
Reheat (HWR) can operate in three modes: cooling, cooling
with reheat, and heating. The cooling and heating modes are
like other Aquazone™ water source heat pumps. The reversing
The loop pump circulates condenser water through the hy-
dronic reheat coil during the reheat mode of operation (refer to
Fig. 28). In this application, the loop pump is only energized
31
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during the reheat mode of operation. The hydronic coil is uti-
lized during the reheat mode of operation to reheat the air to the
set point of the proportional controller. Condenser water is di-
verted by the motorized valve and pumped through the hydron-
ic coil by the loop pump in proportion to the control set point.
The amount of reheating is dependent on the set point and how
far from the set point the supply air temperature is. The factory
set point is 70 to 75 F, generally considered "neutral" air.
NLL staged heating mode will then provide heating during the
NSB period.
Water Valve (Slow Opening) — If relay is config-
ured for Water Valve (slow opening), the relay will start 60 sec-
onds prior to starting compressor relay.
Outside Air Damper (OAD) — If relay is configured
for OAD, the relay will normally be ON any time the Fan
Enable relay is energized. The relay will not start for
30 minutes following a return to normal mode from NSB,
when NSB is no longer connected to ground C. After 30 min-
utes, the relay will start if the Fan Enable is set to ON.
D Control Accessory Relay Configurations —
The following accessory relay settings are applicable for both
D controls only:
CYCLE WITH FAN — In this configuration, the relay will be
ON any time the Fan Enable relay is on.
CYCLE WITH COMPRESSOR — In this configuration, the
relay will be ON any time the Compressor relay is on.
DIGITAL NIGHT SET BACK (NSB) — In this configura-
tion, the relay will be ON if the NSB input is connected to
ground C.
NOTE: If there are no relays configured for digital NSB, then
the NSB and override (OVR) inputs are automatically config-
ured for mechanical operation.
To avoid equipment damage, DO NOT leave system filled
in a building without heat during the winter unless anti-
freeze is added to system water. Condenser coils never
fully drain by themselves and will freeze unless winterized
with antifreeze.
START-UP
MECHANICAL NIGHT SET BACK — When NSB input is
connected to ground C, all thermostat inputs are ignored. A
thermostat set back heating call will then be connected to the
OVR input. If OVR input becomes active, then the D control
will enter Night Low Limit (NLL) staged heating mode. The
Use the procedure outlined below to initiate proper unit
start-up.
NOTE: This equipment is designed for indoor installation only.
Table 17 — HWR Operating Modes
INPUT
Y1
Off
Off
On
On
On
Off
On
On
OUTPUT
MODE
O
On/Off
On/Off
On
On
On
On/Off
Off
Off
G
Y2*
Off
Off
Off
On
On/Off
Off
Off
On
On/Off
H
O
On/Off
On/Off
On
On
On
On
Off
Off
Off
G
Y1
Off
Off
On
On
On
On
On
On
On
Y2*
Off
Off
Off
On
On/Off
On
Off
On
On/Off
Reheat
Off
Off
Off
Off
Off
On
Off
Off
No Demand
Fan Only
Cooling Stage 1
Off
On
On
On
On
Off
On
On
On
Off
Off
Off
Off
On
On
Off
Off
On
Off
On
On
On
On
On
On
On
On
Cooling Stage 2
†
Cooling and Dehumidistat
Dehumidistat Only
Heating Stage 1
Heating Stage 2
Heating and Dehumidistat**
Off
On
Off
*Not applicable for single stage units; Full load operation for dual capacity units.
†Cooling input takes priority over dehumidify input.
**Deluxe D is programmed to ignore the H demand when the unit is in heating mode.
NOTE: On/Off is either on or off.
Water Out
(To Water Loop)
Refrigerant In
(Cooling)
Mixing Valve
Water In
(From Water Loop)
Internal Pump
COAX
Refrigerant Out
(Cooling)
Leaving
Air
Entering Air
a50-8145.eps
Reheat
Coil
Evaporator Coil
NOTE: All components shown are
internal to the heat pump unit.
Fig. 28 — HWR Schematic
32
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Operating Limits
Unit Start-Up Cooling Mode
ENVIRONMENT — This equipment is designed for indoor
installation ONLY. Extreme variations in temperature, hu-
midity and corrosive water or air will adversely affect the
unit performance, reliability and service life.
POWER SUPPLY — A voltage variation of ± 10% of
nameplate utilization voltage is acceptable.
UNIT STARTING CONDITIONS — Depending on the
model, units start and operate in an ambient temperature of
45 F with entering-air temperature at 40 F or 50 F, entering-
water temperature at 20 F or 50 F and with both air and water at
the flow rates used.
1. Adjust the unit thermostat to the warmest position.
Slowly reduce the thermostat position until the compres-
sor activates.
2. Check for cool air delivery at unit grille a few minutes
after the unit has begun to operate.
3. Verify that the compressor is on and that the water flow
rate is correct by measuring pressure drop through the
heat exchanger using P/T plugs. See Table 20. Check the
elevation and cleanliness of the condensate lines; any
dripping could be a sign of a blocked line. Be sure the
condensate trap includes a water seal.
NOTE: These operating limits are not normal or continuous
operating conditions. Assume that such a start-up is for the
purpose of bringing the building space up to occupancy
temperature. See Tables 18 and 19 for operating limits.
4. Check the temperature of both supply and discharge wa-
ter. Compare to Table 21. If temperature is within range,
proceed. If temperature is outside the range, check the
cooling refrigerant pressures in Table 21.
5. Check air temperature drop across the coil when com-
pressor is operating. Air temperature drop should be
between 15 and 25 F.
When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise
caution when working with the energized equipment.
Failure to heed this warning could lead to personal
injury.
Table 18 — Operating Limits — 50RHC,RVC Units
50RHC,RVC
AIR LIMITS
Cooling
45 F
80.6 F
Heating
45 F
68 F
85 F
50 F
Min. Ambient Air – db
Rated Ambient Air – db
Max. Ambient Air – db
Min. Entering Air – db/wb
Rated Entering Air – db/wb
Max. Entering Air – db/wb
WATER LIMITS
1. Restore power to system.
2. Turn thermostat fan position to ON. Blower should
start.
3. Balance airflow at registers.
4. Adjust all valves to the full open position and turn on
the line power to all heat pump units.
110 F
70/61 F
80.6/66.2 F
95/76 F
68 F
80 F
Min. Entering Water
50 F
60-90 F
110 F
50 F
60-70 F
90 F
5. Operate unit in the cooling cycle. Refer to Tables 18
and 19 for unit operating limits.
Normal Entering Water
Max. Entering Water
Normal Water Flow
NOTE: Three factors determine the operating limits of a
unit: (1) entering-air temperature, (2) water temperature and
(3) ambient temperature. Whenever any of these factors are
at a minimum or maximum level, the other two factors must
be at a normal level to ensure proper unit operation. See
Tables 18 and 19.
2.5-3.0 gpm per ton
LEGEND
db — Dry Bulb
wb — Wet Bulb
Table 19 — Operating Limits —
50RHR,RHS,RVR,RVS,RDS Units
Scroll Compressor Rotation — It is important to
be certain compressor is rotating in the proper direction. To
determine whether or not compressor is rotating in the prop-
er direction:
1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.
AIR LIMITS
Min. Ambient Air
COOLING (F) HEATING (F)
45
80
45
70
85
40
70
80
Rated Ambient Air
Max. Ambient Air
Min. Entering Air
Rated Entering Air db/wb
Max. Entering Air db/wb
WATER LIMITS
100
50
80/67
110/83
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Turn off power to the unit. Install disconnect tag.
Min. Entering Water
Normal Entering Water
LEGEND
30
50-90
20
30-60
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are correct.
db — Dry Bulb
wb — Wet Bulb
NOTE: Value in heating column is dry bulb only. Any wet bulb read-
ing is acceptable.
The suction and discharge pressure levels should now move
to their normal start-up levels.
Table 20 — Water Temperature Change
Through Heat Exchanger
When the compressor is rotating in the wrong direction, the
unit makes more noise and does not provide cooling.
After a few minutes of reverse operation, the scroll com-
pressor internal overload protection will open, thus activating
the unit lockout. This requires a manual reset. To reset, turn the
thermostat on and then off.
COOLING
RISE (F)
HEATING
DROP (F)
WATER FLOW RATE (GPM)
Min
Max
Min
Max
For Closed Loop: Ground Source or
Cooling/Boiler Systems at 3 gpm/ton
9
12
4
8
NOTE: There is a 5-minute time delay before the compressor
will start.
For Open Loop: Ground Water Systems at
1.5 gpm/ton
20
26
10
17
33
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directions with a high volume of water at a high velocity. Fol-
low the steps below to properly flush the loop:
1. Verify power is off.
2. Fill loop with water from hose through flush cart before
using flush cart pump to ensure an even fill. Do not allow
the water level in the flush cart tank to drop below the
pump inlet line to prevent air from filling the line.
3. Maintain a fluid level in the tank above the return tee to
avoid air entering back into the fluid.
4. Shutting off the return valve that connects into the flush
cart reservoir will allow 50 psi surges to help purge air
pockets. This maintains the pump at 50 psi.
5. To purge, keep the pump at 50 psi until maximum pump-
ing pressure is reached.
Unit Start-Up Heating Mode
NOTE: Operate the unit in heating cycle after checking the
cooling cycle. Allow 5 minutes between tests for the pressure
or reversing valve to equalize.
1. Turn thermostat to lowest setting and set thermostat
switch to HEAT position.
2. Slowly turn the thermostat to a higher temperature until
the compressor activates.
3. Check for warm air delivery at the unit grille within a few
minutes after the unit has begun to operate.
4. Check the temperature of both supply and discharge wa-
ter. Compare to Table 21. If temperature is within range,
proceed. If temperature is outside the range, check the
heating refrigerant pressures in Table 21.
6. Open the return valve to send a pressure surge through
the loop to purge any air pockets in the piping system.
5. Once the unit has begun to run, check for warm air deliv-
ery at the unit grille.
7. A noticeable drop in fluid level will be seen in the flush
cart tank. This is the only indication of air in the loop.
NOTE: If air is purged from the system while using a 10 in.
PVC flush tank, the level drop will only be 1 to 2 in. since
liquids are incompressible. If the level drops more than this,
flushing should continue since air is still being compressed in
the loop. If level is less than 1 to 2 in., reverse the flow.
8. Repeat this procedure until all air is purged.
9. Restore power.
Antifreeze may be added before, during or after the flushing
process. However, depending on when it is added in the
process, it can be wasted. Refer to the Antifreeze section for
more detail.
Loop static pressure will fluctuate with the seasons. Pres-
sures will be higher in the winter months than during the
warmer months. This fluctuation is normal and should be con-
sidered when charging the system initially. Run the unit in
either heating or cooling for several minutes to condition the
loop to a homogenous temperature.
6. Check air temperature rise across the coil when compres-
sor is operating. Air temperature rise should be between
20 and 30 F after 15 minutes at load.
7. Check for vibration, noise and water leaks.
Flow Regulation — Flow regulation can be accom-
plished by two methods. Most water control valves have a flow
adjustment built into the valve. By measuring the pressure drop
through the unit heat exchanger, the flow rate can be deter-
mined. See Tables 22-24. Adjust the water control valve until
the flow of 1.5 to 2 gpm is achieved. Since the pressure con-
stantly varies, two pressure gages may be needed in some
applications.
An alternative method is to install a flow control device.
These devices are typically an orifice of plastic material de-
signed to allow a specified flow rate that are mounted on the
outlet of the water control valve. Occasionally these valves
produce a velocity noise that can be reduced by applying some
back pressure. To accomplish this, slightly close the leaving
isolation valve of the well water setup.
When complete, perform a final flush and pressurize the
loop to a static pressure of 40 to 50 psi for winter months or 15
to 20 psi for summer months.
After pressurization, be sure to remove the plug from the
end of the loop pump motor(s) to allow trapped air to be
discharged and to ensure the motor housing has been flooded.
Be sure the loop flow center provides adequate flow through
the unit by checking pressure drop across the heat exchanger.
Compare the results to the data in Tables 22-24.
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position before flushing system.
Flushing — Once the piping is complete, units require final
purging and loop charging. A flush cart pump of at least 1.5 hp
is needed to achieve adequate flow velocity in the loop to purge
air and dirt particles from the loop. Flush the loop in both
Table 21 — Typical Unit Operating Pressures and Temperatures
COOLING
HEATING
ENTERING
Water
Temp
Rise
(F)
Air
Temp
Drop (F)
DB
Water
Temp
Drop (F)
DB
WATER
TEMP (F)
(EWT)
GPM/
TON
Suction
Pressure
(psig)
Discharge Super-
Sub-
cooling
(F)
Suction
Pressure
(psig)
Discharge
Pressure
(psig)
Sub-
Air
Super-
Pressure
(psig)
heat
(F)
cooling
(F)
Temp
heat (F)
Rise (F)
1.5
2.3
3.0
75-85
74-84
73-83
90-105
80- 95
70- 85
25-40
25-40
25-40
12-20
11-18
10-16
21-24
13-16
6-11
21-26
21-26
21-26
34- 39
37- 43
40- 46
167-186
172-191
177-196
12-16
12-16
12-16
1-4
1-4
1-4
7.6- 8.4
4.8- 5.6
3.4- 4.2
14-20
16-22
16-22
30
50
1.5
2.3
3.0
75-85
74-84
73-83
125-155
120-142
115-138
12-20
12-20
12-20
10-18
9-16
8-14
20-23
12-15
8-12
20-25
20-25
20-25
50- 60
53- 62
55- 65
180-210
185-215
190-220
10-17
10-17
10-17
1-5
1-5
1-5
10.8-11.9
6.7- 8.1
5.1- 5.9
23-29
24-30
25-31
1.5
2.3
3.0
75-85
74-84
73-83
179-198
168-186
158-175
9-16
9-16
9-16
8-15
8-14
8-12
19-22
12-17
7-12
19-24
19-24
19-24
71- 82
73- 85
76- 88
205-230
210-238
215-242
14-19
14-19
14-19
1-5
1-5
1-5
14.0-15.2
9.0-10.2
6.7- 7.9
28-34
30-37
31-38
70
1.5
2.3
3.0
75-85
74-84
73-83
229-251
218-241
208-230
9-17
9-17
9-17
8-15
8-14
8-12
18-21
10-14
6-11
17-23
17-23
17-23
85- 95
90-100
95-105
220-260
225-265
230-270
18-28
18-28
18-28
2-5
2-5
2-5
14.4-16.6
10.8-12.4
7.2- 8.3
32-39
33-41
35-42
90
1.5
2.3
3.0
77-87
76-86
75-85
280-320
270-310
260-300
8-15
8-15
8-15
10-25
10-24
10-22
17-20
9-13
5-10
15-20
15-20
15-20
110
LEGEND
Dry Bulb
Entering Air Temperature
NOTES:
1. Based on nominal 400 cfm per ton airflow, 70 F EAT heating and 80/67 F
EAT cooling.
DB
EAT
—
—
2. Cooling air and water numbers can vary greatly with changes in humidity.
3. Subcooling is based upon the head pressure at compressor service port.
4. Unit should not be operated in heating mode with an EWT of 110.
34
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Table 22 — 50RHR,RVR Coaxial
Water Pressure Drop
Table 24 — 50RHC,RVC Coaxial
Water Pressure Drop
WATER TEMPERATURE (F)
WATER TEMPERATURE (F)
UNIT
50RHR,RVR
UNIT
50RHC,RVC
GPM
30 F
50 F
70 F
90 F
GPM
60 F
70 F
80 F
90 F
Pressure Drop (psi)
Pressure Drop (psi)
0.9
1.1
1.7
2.0
0.7
1.2
1.9
2.9
0.7
1.2
1.9
2.8
0.7
1.2
1.8
2.7
0.6
1.1
1.8
2.6
0.8
1.1
1.5
0.8
1.2
2.0
0.8
1.1
1.9
0.7
1.0
1.8
0.7
1.0
1.7
006*
009
012
015
019
024
030
036
042
048
060
006*
009
012
018
024
030
036
041†
042
048
060
1.1
1.7
2.2
1.2
1.7
3.5
1.1
1.6
3.2
1.0
1.5
3.0
0.9
1.4
2.8
1.1
1.7
2.3
3.0
2.4
3.1
4.0
5.4
2.3
3.0
3.9
5.3
2.3
2.9
3.8
5.1
2.2
2.8
3.7
4.9
1.5
2.3
3.0
2.8
6.0
9.6
2.6
5.6
9.0
2.4
5.2
8.3
2.3
4.9
7.9
1.5
2.3
3.0
4.0
2.3
4.4
2.2
4.3
2.1
4.2
2.1
4.0
1.8
2.6
3.5
2.5
4.8
8.1
2.3
4.5
7.6
2.1
4.1
7.0
2.0
3.9
6.6
6.4
6.2
6.0
5.8
13.3
12.9
12.6
12.2
2.3
3.5
4.5
6.0
2.0
3.1
4.2
5.9
2.0
3.0
4.1
5.7
1.9
2.9
3.9
5.6
1.8
2.8
3.8
5.4
2.3
3.4
4.5
1.9
3.4
6.6
1.7
3.1
6.2
1.6
2.9
5.7
1.5
2.7
5.4
3.0
4.5
6.0
2.0
4.2
7.0
1.9
3.9
6.5
1.7
3.6
6.0
1.6
3.4
5.7
3.0
4.5
6.0
8.0
2.0
3.9
1.9
3.7
1.8
3.6
1.8
3.5
5.8
9.7
6.4
6.2
6.0
3.8
5.5
7.5
1.4
2.4
3.9
1.3
2.3
3.7
1.2
2.1
3.4
1.2
2.0
3.2
10.6
10.3
10.0
3.8
5.5
1.5
2.7
4.3
6.9
1.5
2.6
4.2
6.7
1.4
2.5
4.1
6.5
1.4
2.4
3.9
6.3
4.5
6.8
9.0
1.1
2.1
3.5
1.1
2.0
3.3
1.0
1.9
3.0
0.9
1.8
2.9
7.5
10.0
4.5
6.8
1.7
3.2
5.0
8.2
1.7
3.1
4.9
7.9
1.6
3.0
4.8
7.7
1.6
2.9
4.6
7.5
5.3
7.9
10.5
1.4
2.9
4.6
1.3
2.7
4.2
1.2
2.5
3.9
1.2
2.3
3.7
9.0
12.0
6.0
9.0
12.0
2.1
3.9
6.4
1.9
3.7
5.9
1.8
3.4
5.5
1.7
3.2
5.2
5.3
7.9
10.5
13.0
0.9
2.2
4.0
6.2
0.9
2.1
3.9
6.0
0.9
2.1
3.8
5.8
0.9
2.0
3.6
5.7
7.5
11.3
15.0
2.9
5.7
9.4
2.7
5.3
8.7
2.5
4.9
8.1
2.4
4.7
7.7
5.3
8.0
11.0
14.0
1.0
2.6
5.3
8.7
1.0
2.6
5.1
8.5
1.0
2.5
4.9
8.2
0.9
2.4
4.8
8.0
*Size 006 available in 50RHR unit only.
6.0
9.0
12.0
16.0
1.2
2.9
5.3
9.5
1.2
2.8
5.1
9.2
1.2
2.7
4.9
8.9
1.1
2.6
4.8
8.6
Table 23 — 50RHS,RVS,RDS Coaxial
Water Pressure Drop
WATER TEMPERATURE (F)
7.5
11.3
15.0
20.0
4.4
7.6
11.4
17.6
4.2
7.3
11.1
17.1
4.1
7.1
10.8
16.6
4.0
6.9
10.4
16.1
UNIT
50RHS,RVS,RDS
GPM
30 F
50 F
70 F
90 F
Pressure Drop (psi)
1.8
2.8
3.8
2.2
3.5
4.5
3.0
4.5
6.0
3.7
5.5
7.5
4.5
7.0
9.0
5.2
8.0
10.5
6.0
9.0
12.0
7.5
11.3
15.0
9.0
13.5
18.0
0.6
1.0
1.5
0.7
1.3
1.8
0.6
1.1
1.8
0.8
1.6
2.6
1.3
2.1
3.9
1.6
3.2
5.1
2.1
3.9
6.4
1.1
2.2
3.6
0.5
0.9
1.4
0.7
1.2
1.8
0.6
1.1
1.7
0.8
1.4
2.4
1.2
1.9
3.7
1.5
3.0
4.7
1.9
3.7
5.9
1.0
2.1
3.4
0.5
0.8
1.3
0.6
1.1
1.6
0.5
1.0
1.5
0.7
1.3
2.2
1.1
1.8
3.4
1.4
2.8
4.4
1.8
3.4
5.5
1.0
1.9
3.1
0.5
0.8
1.2
0.6
1.1
1.5
0.5
0.9
1.5
0.7
1.3
2.1
1.1
1.7
3.2
1.3
2.6
4.1
1.7
3.2
5.2
0.9
1.8
3.0
*Size 006 available in 50RHC unit only.
†Size 041 available in 50RVC unit only.
015
018
024
030
036
042
048
060
070
Antifreeze — In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas
subject to freezing, antifreeze is needed.
Alcohols and glycols are commonly used as antifreeze
agents. Freeze protection should be maintained to 15 F below
the lowest expected entering loop temperature. For example, if
the lowest expected entering loop temperature is 30 F, the leav-
ing loop temperature would be 22 to 25 F. Therefore, the freeze
protection should be at 15 F (30 F – 15 F = 15 F).
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or
introduced under water level to prevent fuming.
Calculate the total volume of fluid in the piping system. See
Table 25. Use the percentage by volume in Table 26 to deter-
mine the amount of antifreeze to use. Antifreeze concentration
should be checked from a well mixed sample using a hydrome-
ter to measure specific gravity.
1.5
3.0
5.0
1.4
2.8
4.7
1.3
2.6
4.3
1.2
2.5
4.1
FREEZE PROTECTION SELECTION — The 30 F FP1
factory setting (water) should be used to avoid freeze damage
to the unit.
Once antifreeze is selected, the JW3 jumper (FP1) should
be clipped on the control to select the low temperature (anti-
freeze 13 F) set point to avoid nuisance faults.
35
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Table 25 — Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
HEATING STAGE 2 — To enter Stage 2 mode, terminal W is
active (Y is already active). Also, the G terminal must be ac-
tive or the W terminal is disregarded. The compressor relay
will remain on and EH1 is immediately turned on. EH2 will
turn on after 10 minutes of continual stage 2 demand.
NOTE: EH2 will not turn on (or if on, will turn off) if FP1 tem-
perature is greater than 45 F and FP2 is greater than 110 F.
EMERGENCY HEAT — In emergency heat mode, terminal
W is active while terminal Y is not. Terminal G must be active
or the W terminal is disregarded. EH1 is immediately turned
on. EH2 will turn on after 5 minutes of continual emergency
heat demand.
PIPE
DIAMETER (in.)
VOLUME (gal.)
Copper
1
1.25
1.5
4.1
6.4
9.2
Rubber Hose
Polyethylene
1
3.9
3/4 IPS SDR11
1 IPS SDR11
11/4 IPS SDR11
1/2 IPS SDR11
2 IPS SDR11
11/4 IPS SCH40
11/2 IPS SCH40
2 IPS SCH40
2.8
4.5
8.0
10.9
18.0
8.3
10.9
17.0
LEGEND
Units with Aquazone Deluxe D Control
IPS
SCH
SDR
—
—
—
Internal Pipe Size
Schedule
Standard Dimensional Ratio
STANDBY/FAN ONLY — The compressor will be off. The
Fan Enable, Fan Speed, and reversing valve (RV) relays will be
on if inputs are present. If there is a Fan 1 demand, the Fan
Enable will immediately turn on. If there is a Fan 2 demand,
the Fan Enable and Fan Speed will immediately turn on.
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 26 — Antifreeze Percentages by Volume
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1
and Fan 2 outputs.
MINIMUM TEMPERATURE FOR
FREEZE PROTECTION (F)
ANTIFREEZE
Methanol (%)
100% USP Food Grade
Propylene Glycol (%)
10
15
20
25
HEATING STAGE 1 — In Heating Stage 1 mode, the Fan
Enable and Compressor relays are turned on immediately.
Once the demand is removed, the relays are turned off and the
control reverts to Standby mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will operate per their associated DIP switch 2 setting
on S1.
HEATING STAGE 2 — In Heating Stage 2 mode, the Fan
Enable and Compressor relays are remain on. The Fan Speed
relay is turned on immediately and turned off immediately
once the demand is removed. The control reverts to Heating
Stage 1 mode. If there is a master/slave or dual compressor
application, all compressor relays and related functions will op-
erate per their associated DIP switch 2 setting on S1.
HEATING STAGE 3 — In Heating Stage 3 mode, the Fan
Enable, Fan Speed and Compressor relays remain on. The EH1
output is turned on immediately. With continuing Heat Stage 3
demand, EH2 will turn on after 10 minutes. EH1 and EH2 are
turned off immediately when the Heating Stage 3 demand is re-
moved. The control reverts to Heating Stage 2 mode.
Output EH2 will be off if FP1 is greater than 45 F AND
FP2 (when shorted) is greater than 110 F during Heating
Stage 3 mode. This condition will have a 30-second recogni-
tion time. Also, during Heating Stage 3 mode, EH1, EH2, Fan
Enable, and Fan Speed will be ON if G input is not active.
25
21
16
10
38
29
30
25
22
20
15
14
Ethanol (%)
Cooling Tower/Boiler Systems — These systems typ-
ically use a common loop temperature maintained at 60 to 90 F.
Carrier recommends using a closed circuit evaporative cooling
tower with a secondary heat exchanger between the tower and
the water loop. If an open type cooling tower is used continu-
ously, chemical treatment and filtering will be necessary.
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems (50RHR,RVR,
RHS,RVS,RDS Only) — These systems allow water
temperatures from 30 to 110 F. The external loop field is divid-
ed up into 2 in. polyethylene supply and return lines. Each line
has valves connected in such a way that upon system start-up,
each line can be isolated for flushing using only the system
pumps. Locate air separation in the piping system prior to the
fluid re-entering the loop field.
OPERATION
Power Up Mode — The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
EMERGENCY HEAT — In Emergency Heat mode, the Fan
Enable and Fan Speed relays are turned on. The EH1 output is
turned on immediately. With continuing Emergency Heat de-
mand, EH2 will turn on after 5 minutes. Fan Enable and Fan
Speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.
Units with Aquazone™ Complete C Control
Output EH1, EH2, Fan Enable, and Fan Speed will be ON if
the G input is not active during Emergency Heat mode.
STANDBY — Y and W terminals are not active in standby
mode, however the O and G terminals may be active, depend-
ing on the application. The compressor will be off.
COOLING — Y and O terminals are active in Cooling mode.
After power up, the first call to the compressor will initiate a
5 to 80 second random start delay and a 5-minute anti-short
cycle protection time delay. After both delays are complete, the
compressor is energized.
NOTE: On all subsequent compressor calls the random start
delay is omitted.
HEATING STAGE 1 — Terminal Y is active in heating
stage 1. After power up, the first call to the compressor will
initiate a 5 to 80 second random start delay and a 5-minute
anti-short cycle protection time delay. After both delays are
complete, the compressor is energized.
COOLING STAGE 1 — In Cooling Stage 1 mode, the Fan
Enable, compressor and RV relays are turned on immediately.
If configured as stage 2 (DIP switch set to OFF) then the com-
pressor and fan will not turn on until there is a stage 2 demand.
The fan Enable and compressor relays are turned off immedi-
ately when the Cooling Stage 1 demand is removed. The con-
trol reverts to Standby mode. The RV relay remains on until
there is a heating demand. If there is a master/slave or dual
compressor application, all compressor relays and related func-
tions will track with their associated DIP switch 2 on S1.
COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan
Enable, compressor and RV relays remain on. The Fan Speed
relay is turned on immediately and turned off immediately
once the Cooling Stage 2 demand is removed. The control re-
verts to Cooling Stage 1 mode. If there is a master/slave or dual
NOTE: On all subsequent compressor calls the random start
delay is omitted.
36
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compressor application, all compressor relays and related func-
tions will track with their associated DIP switch 2 on S1.
NOTE: If 3 consecutive faults occur without satisfying the
thermostat input call to terminal Y, the control will go into
lockout mode. The last fault causing the lockout is stored in
memory and can be viewed by entering Test mode.
NIGHT LOW LIMIT (NLL) STAGED HEATING — In
NLL staged Heating mode, the override (OVR) input becomes
active and is recognized as a call for heating and the control
will immediately go into a Heating Stage 1 mode. With an ad-
ditional 30 minutes of NLL demand, the control will go into
Heating Stage 2 mode. With another additional 30 minutes of
NLL demand, the control will go into Heating Stage 3 mode.
Table 27 — Complete C Control Current LED
Status and Alarm Relay Operations
LED STATUS
DESCRIPTION OF OPERATION
ALARM RELAY
Normal Mode
Open
Cycle
(closed 5 sec.,
Open 25 sec.)
On
Normal Mode with
PM Warning
Units with HWR Option
FAN ONLY — A (G) call from the thermostat to the (G)
terminal of the Deluxe D control board will bring the unit
on in fan only mode.
COOLING STAGE 1 — A simultaneous call from (G),
(Y1), and (O) to the (G), (Y1), (O/W2) terminals of the Deluxe
D control board will bring the unit on in 1st Stage Cooling.
COOLING STAGE 2 — A simultaneous call from (G),
(Y1), (Y2), and (O) to the (G), (Y1), (Y2), and (O/W2) ter-
minals of the Deluxe D control board will bring the unit on
in Cooling Stage 2. When the call is satisfied at the thermo-
stat the unit will continue to run in Cooling Stage 1 until the
Cooling Stage 1 call is removed or satisfied, shutting down
the unit.
Complete C Control is
non-functional
Off
Open
Slow Flash
Fast Flash
Fault Retry
Lockout
Open
Closed
Open
(Closed after
15 minutes)
Slow Flash
Over/Under Voltage Shutdown
Test Mode — No fault in
memory
Test Mode — HP Fault in
memory
Test Mode — LP Fault in
memory
Test Mode — FP1 Fault in
memory
Test Mode — FP2 Fault in
memory
Test Mode — CO Fault in
memory
Test Mode — Over/Under
shutdown in memory
Test Mode — PM in memory
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
NOTE: Not all units have two-stage cooling functionality.
HEATING STAGE 1 — A simultaneous call from (G) and
(Y1) to the (G) and (Y1) terminals of the Deluxe D control
board will bring the unit on in Heating Stage 1.
HEATING STAGE 2 — A simultaneous call from (G),
(Y1), and (Y2) to the (G), (Y1), and (Y2) terminals of the
Deluxe D control board will bring the unit on in Heating
Stage 2. When the call is satisfied at the thermostat the unit
will continue to run in Heating Stage 1 until the call is
removed or satisfied, shutting down the unit.
Flashing Code 7
Flashing Code 8
Flashing Code 9
Cycling Code 7
Cycling Code 8
Cycling Code 9
Test Mode — FP1/FP2
Swapped Fault in memory
LEGEND
CO
FP
HP
—
—
—
Condensate Overflow
Freeze Protection
High Pressure
LED
LP
PM
—
—
—
Light-Emitting Diode
Low Pressure
Performance Monitor
NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by
a 10-second pause. This sequence will repeat continually until the fault is
cleared.
NOTE: Not all units have two-stage heating functionality.
REHEAT MODE — A call from the humidistat/dehumid-
istat to the (H) terminal of the Deluxe D control board will
bring the unit on in Reheat Mode if there is no call for cool-
ing at the thermostat. When the humidistat/dehumidistat call
is removed or satisfied the unit will shut down.
NOTE: Cooling always overrides Reheat Mode. In the Cool-
ing mode, the unit cools and dehumidifies. If the cooling
thermostat is satisfied but there is still a call for dehumidifi-
cation, the unit will continue to operate in Reheat Mode.
Table 28 — Complete C Control LED Code and
Fault Descriptions
LED
CODE
1
FAULT
DESCRIPTION
No fault in memory
There has been no fault since
the last power-down to power-
up sequence
2
3
High-Pressure Switch
Low-Pressure Switch
HP Open Instantly
SYSTEM TEST
LP open for 30 continuous
seconds before or during a
call (bypassed for first 60 sec-
onds)
FP1 below Temp limit for 30
continuous seconds
(bypassed for first 60 seconds
of operation)
FP2 below Temp limit for 30
continuous seconds
(bypassed for first 60 seconds
of operation)
Sense overflow (grounded)
for 30
continuous seconds
System testing provides the ability to check the control
operation. The control enters a 20-minute Test mode by mo-
mentarily shorting the test pins. All time delays are increased
15 times. See Fig. 19-22.
4
5
6
Freeze Protection
Coax — FP1
Test Mode — To enter Test mode on Complete C or Deluxe
D controls, cycle the power 3 times within 60 seconds. The LED
(light-emitting diode) will flash a code representing the last fault
when entering the Test mode. The alarm relay will also power on
and off during Test mode. See Tables 27 and 28. To exit Test
mode, short the terminals for 3 seconds or cycle the power 3
times within 60 seconds.
Freeze Protection Air Coil
— FP2
Condensate overflow
7 (Autoreset) Over/Under Voltage
"R" power supply is <19VAC
or >30VAC
Shutdown
NOTE: Deluxe D Control has a flashing code and alarm relay
cycling code that will both have the same numerical label.
For example, flashing code 1 will have an alarm relay cycling
code 1. Code 1 indicates the control has not faulted since the
last power off to power on sequence.
8
9
PM Warning
Performance Monitor Warning
has occurred.
FP1 temperature is higher
than FP2 in heating/test
mode, or FP2 temperature is
higher than FP1 in cooling/
test mode.
FP1 and FP2
Thermistors are swapped
Retry Mode — In Retry mode, the status LED will start to
flash slowly to signal that the control is trying to recover from
an input fault. The control will stage off the outputs and try to
again satisfy the thermostat used to terminal Y. Once the ther-
mostat input calls are satisfied, the control will continue normal
operation.
LEGEND
CO
FP
HP
—
—
—
Condensate Overflow
Freeze Protection
High Pressure
LED
—
—
—
Light-Emitting Diode
Low Pressure
Performance Monitor
LP
PM
37
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Aquazone™ Deluxe D Control LED Indica-
Filters — Filters must be clean for maximum performance.
Inspect filters every month under normal operating conditions.
replace when necessary.
tors — There are 3 LED indicators on the Deluxe D Control:
STATUS LED — Status LED indicates the current status or
mode of the Deluxe D control. The Status LED light is green.
TEST LED — Test LED will be activated any time the De-
luxe D control is in test mode. The Test LED light is yellow.
IMPORTANT: Units should never be operated with-
out a filter.
FAULT LED — Fault LED light is red. The fault LED will al-
ways flash a code representing the last fault in memory. If there
is no fault in memory, the fault LED will flash code 1 on the
and appear as 1 fast flash alternating with a 10-second pause.
See Table 29.
Water Coil — Keep all air out of the water coil. Check
open loop systems to be sure the well head is not allowing air
to infiltrate the water line. Always keep lines airtight.
Inspect heat exchangers regularly, and clean more frequent-
ly if the unit is located in a “dirty” environment. Keep the heat
exchanger full of water at all times. Open-loop systems should
have an inverted P trap placed in the discharge line to keep
water in the heat exchanger during off cycles. Closed-loop
systems must have a minimum of 15 psi during the summer
and 40 psi during the winter. Generally, the higher the water
flow through the bail, the lower the chance for sealing.
SERVICE
Perform the procedures outlined below periodically, as
indicated.
IMPORTANT: When a compressor is removed from this
unit, system refrigerant circuit oil will remain in the com-
pressor. To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is removed.
Check P trap frequently for proper operation.
IMPORTANT: To avoid fouled machinery and extensive
unit clean-up, DO NOT operate units without filters in
place. DO NOT use equipment as a temporary heat source
during construction.
IMPORTANT: All refrigerant discharged from this unit
must be recovered without exception. Technicians must fol-
low industry accepted guidelines and all local, state and fed-
eral statutes for the recovery and disposal of refrigerants.
Condensate Drain Pans — Check condensate drain
pans for algae growth twice a year. If algae growth is apparent,
consult a water treatment specialist for proper chemical treat-
ment. Applying an algaecide every three months will typically
eliminate algae problems in most locations.
IMPORTANT: To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must only be
serviced by technicians which meet local, state and federal
proficiency requirements.
Refrigerant System — Verify air and water flow rates
are at proper levels before servicing. To maintain sealed circuit-
ry integrity, do not install service gauges unless unit operation
appears abnormal.
Check to see that unit is within the superheat and subcool-
ing temperature ranges shown in Table 21. If the unit is not
within these ranges, recover and reweigh in refrigerant charge.
IMPORTANT: To prevent injury or death due to electrical
shock or contact with moving parts, open unit disconnect
switch before servicing unit.
Table 29 — Aquazone Deluxe D Control Current LED Status and Alarm Relay Operations
STATUS LED
(Green)
TEST LED
(Yellow)
DESCRIPTION
Normal Mode
FAULT LED (Red)
Flash Last Fault Code in Memory
Flashing Code 8
ALARM RELAY
On
Off
Open
Cycle (closed 5 sec,
open 25 sec, …)
Normal Mode with PM
On
Off
Deluxe D Control is
non-functional
Off
Off
Off
Open
Test Mode
Night Setback
ESD
Invalid T-stat Inputs
No Fault in Memory
HP Fault
—
On
—
—
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flashing Code 1
Cycling Appropriate Code
Flashing Code 2
Flashing Code 3
Flashing Code 4
On
—
—
—
Open
Open
Open
Open
Open
—
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Fast Flash
Fast Flash
Fast Flash
Fast Flash
Fast Flash
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Flashing Code 7
Flashing Code 2
Flashing Code 3
LP Fault
FP1 Fault
FP2 Fault
CO Fault
Open
Over/Under Voltage
HP Lockout
LP Lockout
FP1 Lockout
FP2 Lockout
CO Lockout
Open (closed after 15 minutes)
Closed
Closed
Closed
Closed
Closed
Flashing Code 4
Flashing Code 5
Flashing Code 6
LEGEND
CO — Condensate Overflow
ESD — Emergency Shutdown
NOTES:
1. If there is no fault in memory, the Fault LED will flash code 1.
2. Codes will be displayed with a 10-second Fault LED pause.
3. Slow flash is 1 flash every 2 seconds.
HP
LP
PM
—
—
—
High Pressure
Low Pressure
FP
— Freeze Protection
Performance Monitor
4. Fast flash is 2 flashes every 1 second.
5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes fol-
lowed by a 10-second pause. This sequence will repeat continually
until the fault is cleared.
38
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Compressor — Conduct annual amperage checks to in-
sure that amp draw is no more than 10% greater than indicated
on the serial plate data.
FILL CONDENSER WITH
CLEANING SOLUTION. DO
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
PAIL
Fan Motors — All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry opera-
tion is suspected. Periodic maintenance oiling is NOT recom-
mended as it will result in dirt accumulating in the excess oil
and cause eventual motor failure. Conduct annual dry opera-
tion check and amperage check to ensure amp draw is no more
than 10% greater than indicated on serial plate data.
FUNNEL
CHEMICAL ACTION.
1”
PIPE
VENT
PIPE
5’ APPROX
Condensate Drain Cleaning — Clean the drain line
and unit drain pan at the start of each cooling season. Check
flow by pouring water into drain. Be sure trap is filled to main-
tain an air seal.
3’ TO 4’
CONDENSER
Air Coil Cleaning — Remove dirt and debris from evap-
orator coil as required by condition of the coil. A 10% solution
of dishwasher detergent and water is recommended for
cleaning both sides of the coil, followed by a thorough water
rinse. Clean coil with a stiff brush, vacuum cleaner, or com-
pressed air. Use a fin comb of the correct tooth spacing when
straightening mashed or bent coil fins.
PAIL
Fig. 29 — Gravity Flow Method
Condenser Cleaning — Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Sludge build-up may
need to be cleaned in an open water tower system due to
induced contaminants.
GAS VENT
PUMP
PRIMING
CONN.
GLOBE
VALVES
SUCTION
Local water conditions may cause excessive fouling or
pitting of tubes. Condenser tubes should therefore be cleaned at
least once a year, or more often if the water is contaminated.
SUPPLY
1” PIPE
PUMP
SUPPORT
Proper water treatment can minimize tube fouling and
pitting. If such conditions are anticipated, water treatment
analysis is recommended. Refer to the Carrier System Design
Manual, Part 5, for general water conditioning information.
CONDENSER
TANK
REMOVE WATER
REGULATING VALVE
RETURN
FINE MESH
SCREEN
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer’s instructions.
Fig. 30 — Forced Circulation Method
Clean condensers with an inhibited hydrochloric acid
solution. The acid can stain hands and clothing, damage
concrete, and, without inhibitor, damage steel. Cover sur-
roundings to guard against splashing. Vapors from vent pipe
are not harmful, but take care to prevent liquid from being
carried over by the gases.
Checking System Charge — Units are shipped with
full operating charge. If recharging is necessary:
1. Insert thermometer bulb in insulating rubber sleeve on
liquid line near filter drier. Use a digital thermometer for
all temperature measurements. DO NOT use a mercury
or dial-type thermometer.
Warm solution acts faster, but cold solution is just as effec-
tive if applied for a longer period.
2. Connect pressure gage to discharge line near compressor.
GRAVITY FLOW METHOD — Do not add solution faster
than vent can exhaust the generated gases.
3. After unit conditions have stabilized, read head pressure
on discharge line gage.
When condenser is full, allow solution to remain overnight,
then drain condenser and flush with clean water. Follow acid
manufacturer’s instructions. See Fig. 29.
FORCED CIRCULATION METHOD — Fully open vent
pipe when filling condenser. The vent may be closed when
condenser is full and pump is operating. See Fig. 30.
Regulate flow to condenser with a supply line valve. If
pump is a nonoverloading type, the valve may be fully closed
while pump is running.
For average scale deposit, allow solution to remain in con-
denser overnight. For heavy scale deposit, allow 24 hours.
Drain condenser and flush with clean water. Follow acid manu-
facturer’s instructions.
NOTE: Operate unit a minimum of 15 minutes before
checking charge.
4. From standard field-supplied Pressure-Temperature
chart for R-22, find equivalent saturated condensing
temperature.
5. Read liquid line temperature on thermometer; then
subtract from saturated condensing temperature. The dif-
ference equals subcooling temperature.
6. Compare the subcooling temperature with the normal
temperature listed in Table 21. If the measured liquid line
temperature does not agree with the required liquid line
temperature, ADD refrigerant to raise the temperature or
REMOVE refrigerant (using standard practices) to lower
the temperature (allow a tolerance of ± 3° F).
39
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Refrigerant Charging
TROUBLESHOOTING
(Fig. 31 and 32, and Table 30)
When troubleshooting problems with a WSHP, consider the
following.
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system —
this can cause compressor flooding.
Thermistor — A thermistor may be required for single-
phase units where starting the unit is a problem due to low
voltage. See Fig. 31 for thermistor nominal resistance.
NOTE: Do not vent or depressurize unit refrigerant to
atmosphere. Remove and reclaim refrigerant following
accepted practices.
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
Air Coil Fan Motor Removal
Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.
Disconnect motor power wires from motor terminals before
motor is removed from unit.
1. Shut off unit main power supply.
2. Loosen bolts on mounting bracket so that fan belt can be
removed.
0.0
20.0
40.0
60.0
80.0 100.0 120.0 140.0
Temperature (degF)
Fig. 31 — Thermistor Nominal Resistance
3. Loosen and remove the 2 motor mounting bracket bolts
on left side of bracket.
4. Slide motor/bracket assembly to extreme right and lift out
through space between fan scroll and side frame. Rest
motor on a high platform such as a step ladder. Do not
allow motor to hang by its power wires.
Control Sensors — The control system employs 2 nom-
inal 10,000 ohm thermistors (FP1 and FP2) that are used for
freeze protection. Be sure FP1 is located in the discharge fluid
and FP2 is located in the air discharge. See Fig. 32.
AIR
COIL
SUCTION
AIRFLOW
(°F)
AIRFLOW
(°F)
COMPRESSOR
a50-8
THERMISTOR
EXPANSION
VALVE
COAX
DISCHARGE
FP2
FP1
CONDENSATE
OVERFLOW
(CO)
LIQUID
LINE
WATER IN
WATER OUT
LEGEND
AIR COIL
WATER
FREEZE
COAX — Coaxial Heat Exchanger
Airflow
COIL
PROTECTION
PROTECTION
Refrigerant Liquid Line Flow
Fig. 32 — FP1 and FP2 Thermistor Location
40
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Table 30 — Troubleshooting
FAULT
HEATING COOLING
POSSIBLE CAUSE
SOLUTION
Main Power Problems
X
X
Green Status LED Off
Check line voltage circuit breaker and disconnect.
Check for line voltage between L1 and L2 on the contactor.
Check for 24 vac between R and C on controller.
Check primary/secondary voltage on transformer.
HP Fault — Code 2
High Pressure
X
X
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate.
Water temperature out of
range in cooling
Bring water temperature within design parameters.
X
X
Reduced or no airflow in
heating
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Dirty air coil — construction dust etc.
External static too high. Check Tables 8-13.
Air temperature out of range Bring return air temperature within design parameters.
in heating
X
X
X
X
X
X
X
Overcharged with refrigerant Check superheat/subcooling vs typical operating condition Table 21.
Bad HP switch
Insufficient charge
Check switch continuity and operation. Replace.
Check for refrigerant leaks.
LP/LOC Fault — Code 3
Low Pressure/Loss of
Charge
Compressor pump down at Check charge and start-up water flow.
start-up
FP1 Fault — Code 4
Water Freeze Protection
X
Reduced or no water flow in Check pump operation or water valve operation/setting.
heating
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
X
X
Inadequate antifreeze level Check antifreeze density with hydrometer.
Improper freeze protect set- Clip JW2 jumper for antifreeze (10 F) use.
ting (30 F vs 10 F)
X
X
Water temperature out of
range
Bad thermistor
Reduced or no airflow in
cooling
Bring water temperature within design parameters.
X
X
Check temperature and impedance correlation.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check Tables 8-13.
FP2 Fault — Code 5
Air Coil Freeze
Protection
X
X
Air temperature out of range Too much cold vent air. Bring entering air temperature within design
parameters.
Improper freeze protect set- Normal airside applications will require 30 F only.
ting (30 F vs 10 F)
X
X
X
X
X
X
X
Bad thermistor
Blocked drain
Improper trap
Poor drainage
Check temperature and impedance correlation.
Check for blockage and clean drain.
Check trap dimensions and location ahead of vent.
Check for piping slope away from unit.
Condensate Fault —
Code 6
Check slope of unit toward outlet.
Poor venting. Check vent location.
X
X
Moisture on sensor
Under voltage
Check for moisture shorting to air coil.
Check power supply and 24 vac voltage before and during operation.
Check power supply wire size.
Over/Under Voltage —
Code 7
(Auto Resetting)
X
Check compressor starting.
Check 24 vac and unit transformer tap for correct power supply voltage.
Check power supply voltage and 24 vac before and during operation.
Check 24 vac and unit transformer tap for correct power supply voltage.
Check for poor airflow or overcharged unit.
Check for poor water flow or airflow.
X
X
X
X
Over voltage
Performance Monitor —
Code 8
Heating mode FP2>125 F
Cooling mode FP1>125 F
OR FP2< 40 F
FP1 and FP2
Thermistors —
Code 9
X
FP1 temperature is higher
than FP2 temperature.
FP2 temperature is higher
than FP1 temperature.
Swap FP1 and FP2 thermistors.
Swap FP1 and FP2 thermistors.
X
No Fault Code Shown
Unit Short Cycles
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
No compressor operation
Compressor overload
Control board
Dirty air filter
Unit in 'Test Mode'
Unit selection
Compressor overload
Thermostat position
Unit locked out
Compressor overload
Thermostat wiring
See scroll compressor rotation section.
Check and replace if necessary.
Reset power and check operation.
Check and clean air filter.
Reset power or wait 20 minutes for auto exit.
Unit may be oversized for space. Check sizing for actual load of space.
Check and replace if necessary.
Ensure thermostat set for heating or cooling operation.
Check for lockout codes. Reset power.
Check compressor overload. Replace if necessary.
Only Fan Runs
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in Test mode.
LEGEND
RV — Reversing Valve
41
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Table 30 — Troubleshooting (cont)
FAULT
HEATING COOLING
POSSIBLE CAUSE
SOLUTION
Only Compressor Runs
X
X
X
X
Thermostat wiring
Fan motor relay
Check G wiring at heat pump. Jumper G and R for fan operation.
Jumper G and R for fan operation. Check for line voltage across BR
contacts.
Check fan power enable relay operation (if present).
Check for line voltage at motor. Check capacitor.
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in test mode.
X
X
X
X
Fan motor
Thermostat wiring
Unit Does Not Operate in
Cooling
X
Reversing valve
Set for cooling demand and check 24 VAC on RV coil and at control.
If RV is stuck, run high pressure up by reducing water flow and while
operating engage and disengage RV coil voltage to push valve.
X
X
Thermostat setup
Thermostat wiring
Check for 'O' RV setup not 'B'.
Check O wiring at heat pump. Check RV to ensure the valve is chang-
ing over from heating and cooling modes. A 'click' should be heard
when the RV changes modes.
Insufficient Capacity/
Not Cooling or Heating
Properly
X
X
X
Dirty filter
Reduced or no airflow in
heating
Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower Tables 8-13.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower Tables 8-13.
X
X
Reduced or no airflow in
cooling
X
Leaky ductwork
Check supply and return air temperatures at the unit and at distant duct
registers if significantly different, duct leaks are present.
X
X
X
X
X
X
Low refrigerant charge
Restricted metering device Check superheat and subcooling Table 21. Replace.
Defective reversing valve
Thermostat improperly
located
Check superheat and subcooling Table 21.
Manually check the four-way valve to ensure all valves are operational.
Check location and for air drafts behind thermostat.
X
X
X
X
X
X
Unit undersized
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Check for scale (water deposits) and clean if necessary.
Scaling in water heat
exchanger
Inlet water too hot or cold
Reduced or no airflow in
heating
X
X
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower Tables 8-13.
High Head Pressure
X
X
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate. See Table 20.
Inlet water too hot
Check load, loop sizing, loop backfill, ground moisture.
X
Air temperature out of range Bring return air temperature within design parameters.
in heating
X
Scaling in water heat
exchanger
Check for scale (water deposits) and clean if necessary.
X
X
X
X
Unit overcharged
Non-condensables in
system
Check superheat and subcooling. Reweigh in charge.
Evacuate the refrigerant, recharge the system, and then weigh the new
refrigerant charge.
X
X
X
Restricted metering device Check superheat and subcooling per Table 21. Replace.
Low Suction Pressure
Reduced water flow in
heating
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
X
Water temperature out of
range
Bring water temperature within design parameters.
X
Reduced airflow in cooling Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower Tables 8-13.
X
X
Air temperature out of range Too much cold vent air. Bring entering air temperature within design
parameters.
X
X
X
Insufficient charge
Too high airflow
Poor performance
Too high airflow
Unit oversized
Check for refrigerant leaks.
Check blower Tables 8-13.
See 'Insufficient Capacity'.
Check blower Tables 8-13.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Low Discharge Air
Temperature in Heating
High Humidity
X
X
LEGEND
RV — Reversing Valve
Copyright 2007 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500007-01 Printed in U.S.A. Form 50R-5SI Pg 42 6-07 Replaces: 50R-4SI
Book 1
4
Tab 5a 5a
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50RHC,RVC,RHR,RHS,RVR,RVS,RDS
START-UP CHECKLIST
CUSTOMER:___________________________
JOB NAME: _______________________________________
SERIAL NO.:____________________ DATE:_________
MODEL NO.:___________________________
I. PRE-START-UP
DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)
HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS
TIGHT? (Y/N)
HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?
(Y/N)
HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)
HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)
IS AN AIR FILTER INSTALLED? (Y/N)
II. START-UP
IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)
IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.
(Y/N)
UNIT VOLTAGE — COOLING OPERATION
PHASE AB VOLTS
PHASE BC VOLTS
(if 3 phase)
PHASE CA VOLTS
(if 3 phase)
PHASE AB AMPS
PHASE BC AMPS
(if 3 phase)
PHASE CA AMPS
(if 3 phase)
CONTROL VOLTAGE
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N)
.
IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.
TEMPERATURES
FILL IN THE ANALYSIS CHART ATTACHED.
COAXIAL HEAT COOLING CYCLE:
EXCHANGER
FLUID IN
F
F
F
F
FLUID OUT
FLUID OUT
AIR OUT
F
PSI
PSI
FLOW
FLOW
HEATING CYCLE:
FLUID IN
F
F
F
AIR COIL
COOLING CYCLE:
AIR IN
HEATING CYCLE:
AIR IN
AIR OUT
CL-1
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HEATING CYCLE ANALYSIS
PSI
SAT
F
AIR
COIL
SUCTION
F
F
COMPRESSOR
DISCHARGE
EXPANSION
VALVE
COAX
F
LIQUID LINE
F
F
PSI
WATER IN
PSI
WATER OUT
a50-8
LOOK UP PRESSURE DROP IN TABLES 22-24
TO DETERMINE FLOW RATE
COOLING CYCLE ANALYSIS
PSI
°F
SAT
AIR
COIL
SUCTION
°F
°F
COMPRESSOR
DISCHARGE
EXPANSION
VALVE
COAX
°F
LIQUID LINE
°F
°F
PSI
PSI
WATER IN
WATER OUT
a50-8165
LOOK UP PRESSURE DROP IN TABLES 22-24
TO DETERMINE FLOW RATE
HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =
FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x
FLUID FACTOR* =
(Btu/hr)
SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE
(DEG F)
=
SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE
(DEG F)
=
*Use 500 for water, 485 for antifreeze.
Copyright 2007 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
4
Catalog No. 04-53500007-01
Printed in U.S.A.
Form 50R-5SI
Pg CL-2
6-07
Replaces: 50R-4SI
Tab 5a 5a
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|